BS-937 & BS-2075

Custom connector V5 to V6 migration
- input return type
- output type and return type

Conflicts:
	bundles/plugins/org.bonitasoft.studio.connectors/src/org/bonitasoft/studio/connectors/extension/AbstractConnectorDefinitionMapper.java
	bundles/plugins/org.bonitasoft.studio.connectors/src/org/bonitasoft/studio/connectors/extension/IConnectorDefinitionMapper.java