Use local 'libcalico-go' for containerized build
Use local 'libcalico-go' for containerized build

Add a possibility to use custom 'libcalico-go' repo
location while building binaries inside container:

 - bind additional directory with local copy of the
   repository to '/go/src/github.com/projectcalico/libcalico-go'
   folder inside Docker container;
 - modify 'glide.lock', so 'libcalico-go' module is
   taken from local path when binary is built within container
   'repo: file:///go/src/github.com/projectcalico/libcalico-go'.

With this change it's possible to build GO binaries and
test them in order to verify changes to the 'libcalico-go'.

Change-Id: I6b46e8f65c1734eea73bc12fa25ab635d940bf1d

Metaswitch/calico,Metaswitch/calico,neiljerram/felix,neiljerram/felix,neiljerram/felix,matthewdupre/felix,matthewdupre/felix,neiljerram/felix