Update .travis.yml

Author: LakshmiMekala

.travis.yml

@@ -61,6 +61,7 @@ after_success:
     source ${TRAVIS_BUILD_DIR}/mashling-cicd/scripts/init.sh ;
     mashling::module::postbuild mashling mashling ;
     fi"
+  - "if [ -n ${TRAVIS_TAG} ]; then source ${TRAVIS_BUILD_DIR}/mashling-cicd/scripts/init.sh ; mashling::module::postbuild mashling mashling ; fi"    
   - cd $GOPATH   
   - rm -rf $GOPATH/src/github.com/TIBCOSoftware/mashling 
   - go get -u github.com/TIBCOSoftware/flogo-lib/...