Allow pre-releases and fix error message in DIRAC version check

[maxnoe]

BEGINRELEASENOTES
FIX: Allow pre-releases in the DIRAC version check when starting the WebAPP and allow pre-releases for development
ENDRELEASENOTES

[aldbr]

In the next few days, I will try to run the branch in certification, if it does not break, then I will merge it, thanks!

[fstagni]

Given that we will not have anymore pre-releases (ever!), I do not think this is needed. Re-open if you think I am wrong.

[maxnoe]

Given that we will not have anymore pre-releases (ever!), I do not think this is needed. Re-open if you think I am wrong.

The motivation for this change was local development! Where the version is based on the last tag plus some .devXXX git information, aka a pre-release.

It also fixes a genuine bug in the error message.

[maxnoe]

At least the fix for the error message should be taken. I can split if you want, but I think this should go in

[fstagni]

Given that we will not have anymore pre-releases (ever!), I do not think this is needed. Re-open if you think I am wrong.

The motivation for this change was local development! Where the version is based on the last tag plus some .devXXX git information, aka a pre-release.

It also fixes a genuine bug in the error message.

Ah, sorry about that. Re-opened then.