library: move `fatal()` into ca_common.py

this function is defined in various modules, let's move it to
`ca_common.py`

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

library/ceph_crush.py

@@ -8,6 +8,10 @@ from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
 from ansible.module_utils.basic import AnsibleModule
+try:
+    from ansible.module_utils.ca_common import fatal
+except ImportError:
+    from module_utils.ca_common import fatal
 import datetime
 
 ANSIBLE_METADATA = {
@@ -62,16 +66,6 @@ EXAMPLES = '''
 RETURN = '''#  '''
 
 
-def fatal(message, module):
-    '''
-    Report a fatal error and exit
-    '''
-    if module:
-        module.fail_json(msg=message, rc=1)
-    else:
-        raise(Exception(message))
-
-
 def generate_cmd(cluster, subcommand, bucket, bucket_type, containerized=None):
     '''
     Generate command line to execute

library/ceph_key.py

@@ -19,9 +19,9 @@ __metaclass__ = type
 
 from ansible.module_utils.basic import AnsibleModule
 try:
-    from ansible.module_utils.ca_common import is_containerized, container_exec
+    from ansible.module_utils.ca_common import is_containerized, container_exec, fatal
 except ImportError:
-    from module_utils.ca_common import is_containerized, container_exec
+    from module_utils.ca_common import is_containerized, container_exec, fatal
 import datetime
 import json
 import os
@@ -219,17 +219,6 @@ def str_to_bool(val):
         raise ValueError("Invalid input value: %s" % val)
 
 
-def fatal(message, module):
-    '''
-    Report a fatal error and exit
-    '''
-
-    if module:
-        module.fail_json(msg=message, rc=1)
-    else:
-        raise(Exception(message))
-
-
 def generate_secret():
     '''
     Generate a CephX secret

library/ceph_volume.py

@@ -2,9 +2,9 @@
 
 from ansible.module_utils.basic import AnsibleModule
 try:
-    from ansible.module_utils.ca_common import exec_command, is_containerized
+    from ansible.module_utils.ca_common import exec_command, is_containerized, fatal
 except ImportError:
-    from module_utils.ca_common import exec_command, is_containerized
+    from module_utils.ca_common import exec_command, is_containerized, fatal
 import datetime
 import copy
 import json
@@ -186,17 +186,6 @@ EXAMPLES = '''
 '''
 
 
-def fatal(message, module):
-    '''
-    Report a fatal error and exit
-    '''
-
-    if module:
-        module.fail_json(msg=message, changed=False, rc=1)
-    else:
-        raise(Exception(message))
-
-
 def container_exec(binary, container_image):
     '''
     Build the docker CLI to run a command inside a container

module_utils/ca_common.py

@@ -96,3 +96,13 @@ def exit_module(module, out, rc, cmd, err, startd, changed=False):
         changed=changed,
     )
     module.exit_json(**result)
+
+def fatal(message, module):
+    '''
+    Report a fatal error and exit
+    '''
+
+    if module:
+        module.fail_json(msg=message, rc=1)
+    else:
+        raise(Exception(message))