FALCON-2291 Fix the typo in Falcon extensions documentation.

This PR is used for fixing the typo in Falcon extensions documentation. It looks like "extensions" should be "extension".

Author: Pengfei Xuan <pfxuan@gmail.com>

Reviewers: @peeyushb, @sandeepSamudrala

Closes #374 from pfxuan/FALCON-2291
diff --git a/docs/src/site/twiki/restapi/ExtensionDelete.twiki b/docs/src/site/twiki/restapi/ExtensionDelete.twiki
index 2bdd23c..1b9e4ad 100644
--- a/docs/src/site/twiki/restapi/ExtensionDelete.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionDelete.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/delete/sales-monthly
+POST http://localhost:15000/api/extension/delete/sales-monthly
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionInstances.twiki b/docs/src/site/twiki/restapi/ExtensionInstances.twiki
index a11a97a..098aa7b 100644
--- a/docs/src/site/twiki/restapi/ExtensionInstances.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionInstances.twiki
@@ -25,7 +25,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-GET http://localhost:15000/api/extensions/instances/daily-health-bill?start=2012-04-01T00:00
+GET http://localhost:15000/api/extension/instances/daily-health-bill?start=2012-04-01T00:00
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionList.twiki b/docs/src/site/twiki/restapi/ExtensionList.twiki
index 0a43a80..281a57a 100644
--- a/docs/src/site/twiki/restapi/ExtensionList.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionList.twiki
@@ -18,7 +18,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-GET http://localhost:15000/api/extensions/list/billCollection
+GET http://localhost:15000/api/extension/list/billCollection
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionResume.twiki b/docs/src/site/twiki/restapi/ExtensionResume.twiki
index 70cbbff..50b2976 100644
--- a/docs/src/site/twiki/restapi/ExtensionResume.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionResume.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/resume/sales-monthly
+POST http://localhost:15000/api/extension/resume/sales-monthly
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionSchedule.twiki b/docs/src/site/twiki/restapi/ExtensionSchedule.twiki
index c40ef6e..8614495 100644
--- a/docs/src/site/twiki/restapi/ExtensionSchedule.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionSchedule.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/schedule/sales-monthly
+POST http://localhost:15000/api/extension/schedule/sales-monthly
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionSubmit.twiki b/docs/src/site/twiki/restapi/ExtensionSubmit.twiki
index 6b4df32..c177a81 100644
--- a/docs/src/site/twiki/restapi/ExtensionSubmit.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionSubmit.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/submit/hdfs-mirroring
+POST http://localhost:15000/api/extension/submit/hdfs-mirroring
 jobName=sales-monthly
 jobClustername=primaryCluster
 jobClusterValidityStart=2015-03-13T00:00Z
diff --git a/docs/src/site/twiki/restapi/ExtensionSubmitAndSchedule.twiki b/docs/src/site/twiki/restapi/ExtensionSubmitAndSchedule.twiki
index 8a148ce..86c8c34 100644
--- a/docs/src/site/twiki/restapi/ExtensionSubmitAndSchedule.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionSubmitAndSchedule.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/submitAndSchedule/hdfs-mirroring
+POST http://localhost:15000/api/extension/submitAndSchedule/hdfs-mirroring
 jobName=sales-monthly
 jobClustername=primaryCluster
 jobClusterValidityStart=2015-03-13T00:00Z
diff --git a/docs/src/site/twiki/restapi/ExtensionSuspend.twiki b/docs/src/site/twiki/restapi/ExtensionSuspend.twiki
index cc3478f..57d4d27 100644
--- a/docs/src/site/twiki/restapi/ExtensionSuspend.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionSuspend.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/suspend/sales-monthly
+POST http://localhost:15000/api/extension/suspend/sales-monthly
 </verbatim>
 ---+++ Result
 <verbatim>
diff --git a/docs/src/site/twiki/restapi/ExtensionUpdate.twiki b/docs/src/site/twiki/restapi/ExtensionUpdate.twiki
index 1ac626a..98c8198 100644
--- a/docs/src/site/twiki/restapi/ExtensionUpdate.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionUpdate.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/update/hdfs-mirroring
+POST http://localhost:15000/api/extension/update/hdfs-mirroring
 jobName=sales-monthly
 jobClustername=primaryCluster
 jobClusterValidityStart=2015-03-13T00:00Z
diff --git a/docs/src/site/twiki/restapi/ExtensionValidate.twiki b/docs/src/site/twiki/restapi/ExtensionValidate.twiki
index c27f2d7..46d96e8 100644
--- a/docs/src/site/twiki/restapi/ExtensionValidate.twiki
+++ b/docs/src/site/twiki/restapi/ExtensionValidate.twiki
@@ -17,7 +17,7 @@
 ---++ Examples
 ---+++ Rest Call
 <verbatim>
-POST http://localhost:15000/api/extensions/validate/hdfs-mirroring
+POST http://localhost:15000/api/extension/validate/hdfs-mirroring
 jobName=sales-monthly
 jobClustername=primaryCluster
 jobClusterValidityStart=2015-03-13T00:00Z