[NRRPLT-7590] Update Regenerate schemas

[NRRPLT-7590] More Python3 fixes: wsgi, frontend package.json

[NRRPLT-7590] python3 fixes to generatelowrespbr.py

[NRRPLT-7590] Move uwsgi plugin choice from ini to command line.
- Generalize PYTHONPATHs depending on python version.

[NRRPLT-7590] fix python3 support

[NRRPLT-7590] more python3 fixes

 [NRRPLT-7590] Python3 fixes

[NRRPLT-7590] fix gazebo ros packages python site-packages path

[NRRPLT-7590] fix pip version in user_makefile

[NRRPLT-7590] Fix PBR texture script virtual env. Uncommented remove lock file for javascript-based repos

[NRRPLT-7590] Deal with sPyNNaker8 requiring enum34 even on python>=3.4:
- Conditional installation of enum34 in install_spinnaker
- uninstall enum34 from NRP_VIRTUAL_ENV when installing on python>=3.4

[NRRPLT-7590] update to development

[NRRPLT-7590] quote pip version

[NRRPLT-7590] python3 check is done once in nrp_functions.
Improve script robustness:
- Double quoting variables
- Improv...