Fixes #277

Add API support for ldap service
Fixes #277

Update buildout and prepdb for ldap service support
Fixes #277

Add low level code for ldap service
Fixes #277

Add webui support for ldap service.
Merge branch 'master' into issue#277
Add conditional display logic for enabletls and cert
Merge branch 'issue#277' of github.com:schakrava/rockstor-core into issue#277
Fixes #277

Add tls/cert support.