fixed #23065 -- quote constraint names in SQL

[sir-sigurd]

No description provided.

[timgraham]

Can you add regression tests (and a mention in the 1.7.1 release notes)?

[sir-sigurd]

yup, will be done tomorrow

[timgraham]

buildbot, test this please.

[timgraham]

The new test doesn't pass on Oracle:

Traceback (most recent call last):
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/tests/schema/tests.py", line 1100, in test_remove_constraints_capital_letters
    "extra": "",
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/django/db/backends/schema.py", line 101, in execute
    cursor.execute(sql, params)
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/django/db/backends/utils.py", line 63, in execute
    return self.cursor.execute(sql, params)
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/django/db/utils.py", line 95, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/django/db/backends/utils.py", line 63, in execute
    return self.cursor.execute(sql, params)
  File "/home/jenkins/workspace/django-pull-requests/database/oracle11/python/python2.7/django/db/backends/oracle/base.py", line 918, in execute
    return self.cursor.execute(query, self._param_generator(params))
DatabaseError: ORA-01408: such column list already indexed

[sir-sigurd]

test is fixed now

[timgraham]

buildbot, test this please.

[timgraham]

merged in 0bea6c8 and 83cd186, thanks!