Add PyPI templates for RMR python binding

Add triggers to limit library, binding builds appropriately.
Clone NNG using a git commit SHA code, a version that fixes a bug.
Extend pre-build scripts to get RMR version string from repo file.

Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: Ie4b20163260179bff58ad958a7e8b87bbb9c02d2