Use module.fail_json() instead of sys.exit()

cloud/amazon/iam_policy.py

@@ -112,13 +112,12 @@ task:
 '''
 import json
 import urllib
-import sys
 try:
     import boto
     import boto.iam
+    HAS_BOTO = True
 except ImportError:
-    print "failed=True msg='boto required for this module'"
-    sys.exit(1)
+    HAS_BOTO = False
 
 def boto_exception(err):
     '''generic error message handler'''
@@ -278,6 +277,9 @@ def main():
       argument_spec=argument_spec,
   )
 
+  if not HAS_BOTO:
+    module.fail_json(msg='boto required for this module')
+
   state = module.params.get('state').lower()
   iam_type = module.params.get('iam_type').lower()
   state = module.params.get('state')