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
Merge branch 'master' of https://github.com/mantidproject/mantid
refs #6712 Fixed typo
Merge branch 'bugfix/6712_apply_corr' of https://github.com/mantidproject/mantid
Merge branch 'master' of https://github.com/mantidproject/mantid