fix the image name of collector issue and push docker images when skywalking...

fix the image name of collector issue and push docker images when skywalking is tagged and the branch is master

.travis.yml

+sudo: required
+
+services:
+  - docker
+
 language: java
 install:
   - cd ci-dependencies

skywalking-collector/skywalking-collector-worker/pom.xml

@@ -101,7 +101,7 @@
                 <version>${docker.plugin.version}</version>
                 <configuration>
                     <skipDocker>false</skipDocker>
-                    <imageName>${docker.cache.imageName}</imageName>
+                    <imageName>skywalking/${docker.cache.imageName}</imageName>
                     <imageTags>
                         <imageTag>${docker.imageTag.version}</imageTag>
                     </imageTags>

travis/push_image.sh

 #!/bin/sh
 
 check_pull_is_tagged() {
-  if [ "${TRAVIS_TAG}" = "" ]; then
+  if [ "${TRAVIS_TAG}" == "" ]; then
     return 1
   else
-    echo "Push the collector image of ${TRAVIS_TAG} version."
     return 0
   fi
+}
 
+check_branch_is_master(){
+    if [ "${TRAVIS_BRANCH}" == "master" ]; then
+        return 0;
+    else
+        return 1;
+    fi
 }
 
 push_collector_image() {
@@ -18,7 +24,7 @@ push_collector_image() {
 }
 
 
-if check_pull_is_tagged; then
+if check_pull_is_tagged && check_branch_is_master; then
     push_collector_image
     echo "Push is Done!"
 fi
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