Rename lib/ceph to lib/charms_ceph

The new python3-ceph-common deb package (introduced in ceph octopus)
adds a new ceph directory (a parent package in python terms) in
/usr/lib/python3/dist-packages/ceph/. This results in a conflict with
charm-ceph-osd/lib/ceph/. For example, with the current import of
ceph.utils in hooks/ceph_hooks.py, Python finds no utils.py in
/usr/lib/python3/dist-packages/ceph/ and then stops searching.
Therefore, rename lib/ceph to lib/charms_ceph to avoid the conflict.

Depends-On: https://review.opendev.org/#/c/709226
Change-Id: Id5bdff991c1e6c196c09ba5a2241ebd5ebe6da91

actions/pool_set.py

@@ -21,7 +21,7 @@ sys.path.append('lib')
 sys.path.append('hooks')
 
 from charmhelpers.core.hookenv import action_get, log, action_fail
-from ceph.broker import handle_set_pool_value
+from charms_ceph.broker import handle_set_pool_value
 
 if __name__ == '__main__':
     name = action_get("name")

actions/set_noout.py

@@ -18,7 +18,7 @@ import sys
 sys.path.append('hooks')
 from charmhelpers.core.hookenv import action_set, action_fail
 sys.path.append('lib')
-from ceph.utils import osd_noout
+from charms_ceph.utils import osd_noout
 
 if __name__ == '__main__':
     result = osd_noout(True)

actions/unset_noout.py

@@ -18,7 +18,7 @@ import sys
 sys.path.append('hooks')
 from charmhelpers.core.hookenv import action_set, action_fail
 sys.path.append('lib')
-from ceph.utils import osd_noout
+from charms_ceph.utils import osd_noout
 
 if __name__ == '__main__':
     result = osd_noout(False)

hooks/ceph_hooks.py

@@ -22,8 +22,8 @@ import sys
 import uuid
 
 sys.path.append('lib')
-import ceph.utils as ceph
-from ceph.broker import (
+import charms_ceph.utils as ceph
+from charms_ceph.broker import (
     process_requests
 )
 

lib/charms_ceph/broker.py

@@ -18,11 +18,11 @@ import os
 
 from tempfile import NamedTemporaryFile
 
-from ceph.utils import (
+from charms_ceph.utils import (
     get_cephfs,
     get_osd_weight
 )
-from ceph.crush_utils import Crushmap
+from charms_ceph.crush_utils import Crushmap
 
 from charmhelpers.core.hookenv import (
     log,

unit_tests/test_ceph_ops.py

@@ -20,7 +20,7 @@ from mock import (
     patch,
 )
 
-from ceph import broker
+from charms_ceph import broker
 
 
 class TestCephOps(unittest.TestCase):