Separate local version with +
Separate local version with +

Silence the setuptools warning and use a PEP404
compliant local version suffix for developer
builds, e.g. 2015.11+5443.3e39623-1

Change-Id: Idbdd01d961999189157f7a7ad0eb273062581948

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server