Support initializing vault with no clients

Currently when vault auto_inititialize [sic] is called a validation
step is run at the end to check that clients connected to vault
have the correct setup. However in sometimes there are no clients
to run validation with (as with cross model relation testing). To
facilitate this expose a new method 'auto_initialize_no_validation'
which skip the client validation.

Also correct the spelling of auto_inititialize but add a partial
to support tests that are already using the old spelling.

zaza/openstack/charm_tests/vault/setup.py

@@ -14,6 +14,7 @@
 
 """Run configuration phase."""
 
+import functools
 import requests
 import tempfile
 
@@ -54,7 +55,7 @@ def basic_setup(cacert=None, unseal_and_authorize=False):
         vault_utils.run_charm_authorize(vault_creds['root_token'])
 
 
-def auto_inititialize(cacert=None):
+def auto_initialize(cacert=None, validation_application='keystone'):
     """Auto initialize vault for testing.
 
     Generate a csr and uploading a signed certificate.
@@ -63,6 +64,9 @@ def auto_inititialize(cacert=None):
 
     :param cacert: Path to CA cert used for vault's api cert.
     :type cacert: str
+    :param validation_application: Name of application to be used as a
+                                   client for validation.
+    :type validation_application: str
     :returns: None
     :rtype: None
     """
@@ -83,7 +87,13 @@ def auto_inititialize(cacert=None):
         root_ca=cacertificate,
         allowed_domains='openstack.local')
 
-    validate_ca(cacertificate)
+    if validation_application:
+        validate_ca(cacertificate, application=validation_application)
+
+
+auto_initialize_no_validation = functools.partial(
+    auto_initialize,
+    validation_application=None)
 
 
 def validate_ca(cacertificate, application="keystone", port=5000):