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
	bundles/plugins/org.bonitasoft.studio.console.libs/META-INF/MANIFEST.MF
	bundles/plugins/org.bonitasoft.studio.importer.bar/src/org/bonitasoft/studio/importer/bar/custom/migration/connector/Connector5Descriptor.java
	bundles/plugins/org.bonitasoft.studio.migration/src/org/bonitasoft/studio/migration/utils/StringToExpressionConverter.java
	patched-plugins/org.eclipse.jdt.core/jdtCompilerAdapter.jar
	platform/platform.target
	tests/org.bonitasoft.studio.importer.bar.tests/src/org/bonitasoft/studio/importer/bar/tests/connector/TestConnectorMigrationUseCase.java
BS-937 & BS-2075

Set referenced element as a Definition OUtput instead of an expression.

Conflicts:
	bundles/plugins/org.bonitasoft.studio.migration/META-INF/MANIFEST.MF
	bundles/plugins/org.bonitasoft.studio.migration/src/org/bonitasoft/studio/migration/utils/StringToExpressionConverter.java