Move the SANSUtility to Python V2

re #6578
Move the SANSadd2 to Python V2

re #6578
Move the SANSBatchMode to Python V2

re #6578
Move the isis_reduction_steps to Python V2

re #6578
Move the isis_reducer to Python V2

re #6578
Move the isis_instrument to Python V2

re #6578
Move the centre_finder to Python V2

re #6578
Move the ISISCommandInterface to Python V2

re #6578
Move isGroup to isinstance(  WorkspaceGroup)

re #6578
Some catchas to be able to use from Mantid ISIS interface

re #6578
Remove the dependency on specific platform

allows to easily test that ISISCommandInterface is working

re #6578
More changes that were triggered by the system tests

re #6578
Solve bug on reducing MERGED data

NOT COVERED BY SYSTEM TESTS!

re #6578
Merge branch 'feature/6578_sans_V1ToV2'
Merge branch 'master' of https://github.com/mantidproject/mantid
refs #6482. Controls hidden unless integrated.
Merge branch 'master' of https://github.com/mantidproject/mantid
Merge remote-tracking branch 'origin/bugfix/6710_broken_autocomplete'
refs #6656 Better(proper) diagnostics from DetectorEfficiencyCor
refs #6656 fixed incorrect brackets in LoadDetectorInfo