ci: fix maven publish steps

Signed-off-by: Denys Smirnov <denys@sourced.tech>

.travis.yml

@@ -123,7 +123,11 @@ jobs:
       jdk: oraclejdk8
 
       install:
-        - go version # override install
+        - GIMME_OUTPUT=$(gimme 1.9 | tee -a $HOME/.bashrc) && eval "$GIMME_OUTPUT"
+        - export GOPATH=$HOME/gopath
+        - mkdir -p $GOPATH/src/gopkg.in/src-d/enry.v1
+        - rsync -az ${TRAVIS_BUILD_DIR}/ $GOPATH/src/gopkg.in/src-d/enry.v1
+        - go get -v gopkg.in/src-d/enry.v1/...
 
       before_script:
         - if [[ -z "$TRAVIS_TAG" ]]; then echo "Skipping this build for non-tag builds."; exit 0; fi