Merge pull request #650 from heketi/lpabon-rel3

Release/3 docker image is now created correctly

extras/docker/unstable/Dockerfile

@@ -10,6 +10,7 @@ ENV BUILD_HOME=/build
 ENV GOPATH=$BUILD_HOME/golang
 ENV PATH=$GOPATH/bin:$PATH
 ENV HEKETIC_CONF_DIR=/etc/heketi
+ENV HEKETI_BRANCH="release/3"
 
 # install dependencies, build and cleanup
 RUN mkdir $BUILD_HOME $GOPATH $HEKETI_CONF_DIR && \
@@ -18,7 +19,7 @@ RUN mkdir $BUILD_HOME $GOPATH $HEKETI_CONF_DIR && \
     dnf -q -y clean all && \
     mkdir -p $GOPATH/src/github.com/heketi && \
     cd $GOPATH/src/github.com/heketi && \
-    git clone https://github.com/heketi/heketi.git && \
+    git clone -b $HEKETI_BRANCH https://github.com/heketi/heketi.git && \
     go get github.com/tools/godep && \
     cd $GOPATH/src/github.com/heketi/heketi && make && \
     cp heketi /usr/bin/heketi && \