project-stage bridge for jsf

the project-stage configured for ds should be used for jsf as well.
in case of a custom test-stage the jsf-project-stage should be Development and in case of a custom project-stage which isn't a test-stage or in case of project-stage Production the jsf default handling should be used.

e.g.:
ds-ps dev + no jsf-ps (default/prod.) - the result for jsf is dev
ds-ps custom-test-stage + no jsf-ps (default/prod.) - the result for jsf is dev
ds-ps default or prod. (= no config) + no jsf-ps (default/prod.) the result for jsf is prod
ds-ps default or prod. (= no config) + jsf-ps e.g. dev - the result for jsf is dev
ds-ps e.g. UnitTest + jsf-ps e.g. dev - the result for jsf is UnitTest (= issue in the config which can be fixed by users - to avoid a runtime-overhead we use the value from ds since ds also checks the jndi config for jsf and values like UnitTest shouldn't be configured via web.xml)