Add builders for LDAP users and groups.

(cherry picked from commit 0e039d9b969845c5b1b7342a54e3b6ef083c81e4)
Add some basic tests for OGDSUpdater.

(cherry picked from commit 1ccb96677a9aff767c7d1c321d7ef6a41fb12a5d)
Fix Unicode handling in OGDSUpdater.

(cherry picked from commit 3607eb8ec31222da8be7d0b7543c614c83d1e93c)

Conflicts:
	docs/HISTORY.txt
Set proper Content-Type header in responses from LDAP control panel views.

(cherry picked from commit 022a146815bbd6e0ac01b257e7bafa8d8a8f8d94)
Fix argument order in log message during OGDS sync.

(cherry picked from commit d922d0dc5ad0d2f26111709f331b74ad027d376a)
Merge pull request #664 from 4teamwork/lg-backport-pr-663

Backport #663 'Fix Unicode handling in OGDSUpdater'