allow fact objects to be instantiated w/o triggering all fact collection

this opens the ability to do specific facts at much lower cost.

lib/ansible/module_utils/facts.py

@@ -118,8 +118,11 @@ class Facts(object):
                  { 'path' : '/usr/bin/pkg',         'name' : 'pkg' },
     ]
 
-    def __init__(self):
+    def __init__(self, load_on_init=True):
+
         self.facts = {}
+
+        if load_on_init:
             self.get_platform_facts()
             self.get_distribution_facts()
             self.get_cmdline()