Rename parsePolicies to parseSwaggerPolicies to avoid conflict (#377)

* Rename parsePolicies to parseSwaggerPolicies to avoid conflict

* Use `nightly` as tag for local build

Co-authored-by: jiang.pengcheng <jiang.pengcheng@navercorp.com>
diff --git a/scripts/lua/management/lib/swagger.lua b/scripts/lua/management/lib/swagger.lua
index 4a63ab6..d70c08c 100644
--- a/scripts/lua/management/lib/swagger.lua
+++ b/scripts/lua/management/lib/swagger.lua
@@ -25,7 +25,7 @@
 -- @param swagger swagger file to parse
 function _M.parseSwagger(swagger)
   local backends = parseBackends(swagger)
-  local policies = parsePolicies(swagger)
+  local policies = parseSwaggerPolicies(swagger)
   local security = parseSecurity(swagger)
   local corsObj = parseCors(swagger)
   local decoded = {
@@ -115,7 +115,7 @@
 
 --- Parse policies in swagger
 -- @param swagger swagger file to parse
-function parsePolicies(swagger)
+function parseSwaggerPolicies(swagger)
   local policies = {}
   -- parse rate limit
   local rlObj = swagger["x-gateway-rate-limit"]
diff --git a/tools/travis/build.sh b/tools/travis/build.sh
index a517275..a36c010 100755
--- a/tools/travis/build.sh
+++ b/tools/travis/build.sh
@@ -39,7 +39,7 @@
 # build docker image locally
 pushd $ROOTDIR
 pwd
-docker build . -t "openwhisk/apigateway"
+docker build . -t "openwhisk/apigateway:nightly"
 popd
 
 $ANSIBLE_CMD wipe.yml