Merge pull request #940 from hpcugent/develop

release EasyBuild v1.13.0
add commandline override for optarch toolchain setting
added unit test.
fix unit test.
override optarch after arch check
coding by trial and error.
made unittest uglier, but works now. 100%. every time. on my machine.
Add env filter regex option for test reports

There is now a regex filter option to clean out the environment before
writting the test report.
fix unit tests by not cleaning up all $EASYBUILD_X env vars, only the ones that matter
bump required version of Lmod to v5.6.3
fix minor remarks w.r.t. style & code organization
Reworked env-regex-filter a bit
env-filter-regex: Fix typo
bump required version of modulecmd to 3.2.10, since we are aware of bugs/missing features in earlier versions
vsc-base update
Merge pull request #13 from boegel/testreport-regex

vsc-base update
Merge pull request #1 from boegel/optarch_cmdline

fix minor remarks w.r.t. style & code organization
rename --env-filter-regex to --test-report-env-filter, add unit test
Merge pull request #14 from boegel/testreport-regex

rename --env-filter-regex to --test-report-env-filter, add unit test
correct unit test, also check whether use --test-report-env-filter is reported correctly