0.9.51

Signed-off-by: Zdenek Maxa <zdenek.maxa@cern.ch>
Add support for the splitting page in reqmgr.py

Add basic support for changing the splitting
with the reqmgr.py script, it is available
through another section in the JSON files.

Also incorporate splitting change in the
allTests procedure.
Merge pull request #4470 from dballesteros7/extendReqMgrScript

Add support for the splitting page in reqmgr.py
Fix wrong ScramArch info on view details page

-Fix wrong ScramArch info on view details page: set of values was nicely
hardcoded in the page definition regardless of the actual values in the
request, shows it correctly now

-CMSSWVersion, ScrachArch and GlobalTag were made immutable on this page.
ScramArch could not have possibly worked anyway.

-links from view/details page to Original Config and TweakFile would yield
Server Error 500 if a request was created with ConfigCache document coming
from a host different from where ReqMgr runs (using ConfigCacheUrl argument).
This was fixed too.

Fixes #4249
Merge pull request #4492 from zdenekmaxa/reqmgr-fix-wrong-scramarch-in-view-page

Fix wrong ScramArch info on view details page