PLAT-5919 Improvements to config checker to be in line with expectations.
Tiny movement of comment.
Merge fixes
Disabled requirment to have legal entity master in old database
Fixed validator to handle CashNodes which an either point at an index or a convention.
Merge branch 'develop' of github.com:OpenGamma/OG-Platform into develop
Added caching to config source and some other sources.
mend