[NRRPLT-5460] Only compile numpy once if needed.

After the removal of the additional hbp-nrp dependencies to
support Bitbucket installation, our Jenkins builds now (again)
build one version of numpy with scipy and one separately as
specified by the CLE. This patch migrates the early installation of
numpy from the CLE to mitigate this.

All packages were updated to future proof dependencies, failure is
ignored and normal installation will proceed if there is no numpy
requirement specified.

Minor pylint cleanup also performed in the setup.py files.

Change-Id: I6b055439c80d931845937939261eb4b6b649c50a