Fix various issues with integration tests

Ports are now set explicitly for secondary (and tertiary etc) products in integration tests when there are multiple instances of a product being used.

Various Bitbucket integration tests have been enabled

Added some checks around exception handling

Simplified maven-plugin-plugin config to speed up build

• Removed all extractors (apart from java-annotations) as they wouldn't find anything.

• Removed redundant 'mojo-descriptor' goal.