implemented not showing skipped hosts config

lib/ansible/plugins/callback/__init__.py

@@ -200,6 +200,7 @@ class CallbackBase:
         self.runner_on_ok(host, result._result)
 
     def v2_runner_on_skipped(self, result):
+        if not C.DISPLAY_SKIPPED_HOSTS:
             host = result._host.get_name()
             #FIXME, get item to pass through
             item = None

lib/ansible/plugins/callback/default.py

@@ -77,6 +77,7 @@ class CallbackModule(CallbackBase):
         self._handle_warnings(result._result)
 
     def v2_runner_on_skipped(self, result):
+        if not C.DISPLAY_SKIPPED_HOSTS:
             msg = "skipping: [%s]" % result._host.get_name()
             if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and not '_ansible_verbose_override' in result._result:
                 msg += " => %s" % self._dump_results(result._result)

lib/ansible/plugins/strategies/__init__.py

@@ -22,7 +22,8 @@ __metaclass__ = type
 from six.moves import queue as Queue
 import time
 
-from ansible.errors import *
+from ansible import constants as C
+from ansible.errors import AnsibleError, AnsibleParserError
 from ansible.executor.task_result import TaskResult
 from ansible.inventory.host import Host
 from ansible.inventory.group import Group