fix catkin_prepare_release to 'git push' only the current branch (#417)
fix catkin_prepare_release to 'git push' only the current branch (#417)

meyerj/catkin,beni55/catkin,meyerj/catkin,thaddeustaylor/catkin,wkentaro/catkin,ros/catkin,harmishhk/catkin,shyamalschandra/catkin,ros/catkin,asmodehn/catkin,meyerj/catkin,scpeters/catkin,jack-oquin/catkin,asmodehn/catkin,beni55/catkin,jack-oquin/catkin,asmodehn/catkin,scpeters/catkin,harmishhk/catkin,thaddeustaylor/catkin,shyamalschandra/catkin,scpeters/catkin,jack-oquin/catkin,wkentaro/catkin,harmishhk/catkin,beni55/catkin,wkentaro/catkin,thaddeustaylor/catkin,shyamalschandra/catkin,ros/catkin