Increase the number of simultaneous database connections allowed
Merge pull request #51 from Metaswitch/iss35

[No reviewer] Increase the number of simultaneous database connections allowed
Ensure that IRSes and service profiles are properly removed on deletion
Code review feedback
Merge pull request #52 from Metaswitch/fix_deletion

[Reviewer: Andy] Ensure that IRSes and service profiles are properly removed on deletion