… to connec if we have already sent it

Eg: BankTransaction, is an immutable entity, Once we see the transactions in Marlin Banking Adapter, it doesnot change
So we don't have to send the transactions again to Connec again, especially during a full_sync
If the full sync is configured to run every day and if we send all transcations to connec every time,
then connec gets overloaded and returns 500

travis-ci/travis-ci#8969 (comment)

Fixed specs, it was in bad shape.
Fixed errors due to rebase conflicts.
Added comment for next statement and refactored into a private method

Organizing examples within contexts
Using before for stubs and data setups