Add tests for checking if admin can modify LDAP defined attributes

[dpakach]

Related to issue #292
Acceptance tests for checking if modifying the attributes is blocked when LDAP attributes are set for those.

[codecov]

Codecov Report

Merging #341 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #341   +/-   ##
=========================================
  Coverage     35.74%   35.74%           
  Complexity     1333     1333           
=========================================
  Files            30       30           
  Lines          3752     3752           
=========================================
  Hits           1341     1341           
  Misses         2411     2411

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[codecov]

Codecov Report

Merging #341 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #341   +/-   ##
=========================================
  Coverage     35.74%   35.74%           
  Complexity     1333     1333           
=========================================
  Files            30       30           
  Lines          3752     3752           
=========================================
  Hits           1341     1341           
  Misses         2411     2411

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ac66ac4...ed9de8c. Read the comment docs.

[phil-davis]

LGTM
This is testing the behavior when trying to modify these attributes using occ commands.
I guess we also will need to test with the provisioning API and in the webUI.