Fix callback plugin for Ansible 2.5 compatability

Ansible 2.5 changed an internal callback method around that is
expected in plugins for options. In order for this to work, we needed
to make some minor changes.

Change-Id: I3801f339511155a4b8ecab91bb06b286b11c0a06
Related-Bug: #1758462
(cherry picked from commit 3631fd4791)

driver-requirements.txt

@@ -22,4 +22,4 @@ ImcSdk>=0.7.2
 sushy
 
 # Ansible-deploy interface
-ansible>=2.4,<2.5.0
+ansible>=2.4

ironic/drivers/modules/ansible/playbooks/callback_plugins/ironic_log.py

@@ -85,13 +85,17 @@ class CallbackModule(object):
         setup_log()
         self.log = logging.getLogger(__name__)
         self.node = None
-        self.opts = {}
+        self._plugin_options = {}
 
     # NOTE(pas-ha) this method is required for Ansible>=2.4
     # TODO(pas-ha) rewrite to support defining callback plugin options
     # in ansible.cfg after we require Ansible >=2.4
-    def set_options(self, options):
-        self.opts = options
+    def set_options(self, option=None, option_value=None):
+        if option:
+            if option_value:
+                self._plugin_options[option] = option_value
+            else:
+                self._plugin_options = option
 
     def runner_msg_dict(self, result):
         self.node = result._host.get_name()