add support for %(pyver)s and %(pyshortver)s templates

[boegel]

fix for #1594

[hpcugentbot]

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[pescobar]

great! thanks for the quick patch 👍

[boegel]

@pescobar: done! Also fixed the breakage of tests, and updated the 'docs':

$ eb --avail-easyconfig-templates | grep -B 1 ver:                                                   
Template names/values for (short) software versions
    perlver: full version for Perl
    perlshortver: short version for Perl (<major>.<minor>)
    pyver: full version for Python
    pyshortver: short version for Python (<major>.<minor>)
    rver: full version for R
    rshortver: short version for R (<major>.<minor>)

[hpcugentbot]

EasyBuild framework unit test suite FAILed.

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[hpcugentbot]

EasyBuild framework unit test suite FAILed.

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[wpoely86]

lgtm but another test needs fixing because of the changes to the tests.

[hpcugentbot]

EasyBuild framework unit test suite FAILed.

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[boegel]

Jenkins: test this please

[hpcugentbot]

EasyBuild framework unit test suite FAILed.

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[boegel]

Jenkins: test this please

[hpcugentbot]

EasyBuild framework unit test suite PASSed (see https://jenkins1.ugent.be/job/easybuild-framework-pr-builder/2647/console for more details).

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[hpcugentbot]

EasyBuild framework unit test suite PASSed (see https://jenkins1.ugent.be/job/easybuild-framework-pr-builder/2648/console for more details).

This pull request is now ready for review/testing.

Please try and find someone who can tackle this; contact @boegel if you're not sure what to do.

[boegel]

Thanks for the review @wpoely86, and @pescobar for the idea/suggestion! Going in...