[ms] script to drop external entities from an external source

[test] repair test: we now have another unique constraint on CWSourceHostConfig

[primary view] properly deprecates render_entity_[summary|metadata]

[ms] simplify cw_source handling : don't try evil optmization that may hurt in some cases

cleanup

[test] make test independant from the working directory

[inline form] ensure entity has an actual eid before using it to check perms

[repo] fix crash introduced in 6625:5c20a005bddc

[ms / integrity] skip properties whose pkey starts with 'sources.' avoid validation error when setting last update time for instance

[sources] method to ease modification of a source config through c-c shell

[pyro source] when cleaning relations of an external entity being cleaned up, only delete local relationsd

[pyro source] new option to control wether external entities should be skipped or not

[d-c check-mapping] small enhancements to avoid spurious warnings

[facet] return else we get name error later