restore version to 0.27.0-SNAPSHOT

This reverts commits e2dcef929352862fc2fce371164b51e19e44ff3a and 45374f733cd5f26da96e5f221ad67777fca149a6.
diff --git a/apache-qpid-proton-j/pom.xml b/apache-qpid-proton-j/pom.xml
index cb22344..9a3048c 100644
--- a/apache-qpid-proton-j/pom.xml
+++ b/apache-qpid-proton-j/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>org.apache.qpid</groupId>
     <artifactId>proton-j-parent</artifactId>
-    <version>0.28.0-SNAPSHOT</version>
+    <version>0.27.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/examples/engine/pom.xml b/examples/engine/pom.xml
index f3bb0e2..b06cb78 100644
--- a/examples/engine/pom.xml
+++ b/examples/engine/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.qpid</groupId>
     <artifactId>proton-j-parent</artifactId>
-    <version>0.28.0-SNAPSHOT</version>
+    <version>0.27.0-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/examples/reactor/pom.xml b/examples/reactor/pom.xml
index 8c569d4..9560b5c 100644
--- a/examples/reactor/pom.xml
+++ b/examples/reactor/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.qpid</groupId>
     <artifactId>proton-j-parent</artifactId>
-    <version>0.28.0-SNAPSHOT</version>
+    <version>0.27.0-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index efabccd..945058f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
   <groupId>org.apache.qpid</groupId>
   <artifactId>proton-j-parent</artifactId>
-  <version>0.28.0-SNAPSHOT</version>
+  <version>0.27.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Proton-J Parent</name>
diff --git a/proton-j/pom.xml b/proton-j/pom.xml
index 1e505ff..245362a 100644
--- a/proton-j/pom.xml
+++ b/proton-j/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.qpid</groupId>
     <artifactId>proton-j-parent</artifactId>
-    <version>0.28.0-SNAPSHOT</version>
+    <version>0.27.0-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/tests/performance-jmh/pom.xml b/tests/performance-jmh/pom.xml
index f9371eb..d9f3c74 100644
--- a/tests/performance-jmh/pom.xml
+++ b/tests/performance-jmh/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>org.apache.qpid</groupId>
         <artifactId>proton-j-parent</artifactId>
-        <version>0.28.0-SNAPSHOT</version>
+        <version>0.27.0-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/tests/pom.xml b/tests/pom.xml
index b558766..a1e25f8 100644
--- a/tests/pom.xml
+++ b/tests/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.qpid</groupId>
     <artifactId>proton-j-parent</artifactId>
-    <version>0.28.0-SNAPSHOT</version>
+    <version>0.27.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>proton-tests</artifactId>