Add socket timeout to uri module.

The uri module can be configured to abort after a specified timeout if
it cannot connect to the configured uri. This prevents a uri action from
hanging indefinitely when the remote endpoint cannot be reached because
it is unavailable, there is a firewall in place etc. The default behavior
is left unchanged: timeout=None

This change also introduces a new type for module_parameters: int
Code was added to perform conversion from string -> int type in
module_common.py.

The new type was required in order to play nice with httplib2 which
refuses to accept (and convert) anything other than a numeric type for
the timeout value.

lib/ansible/module_common.py

@@ -597,6 +597,12 @@ class AnsibleModule(object):
                         self.params[k] = self.boolean(value)
                     else:
                         is_invalid = True
+            elif wanted == 'int':
+                if not isinstance(value, int):
+                    if isinstance(value, basestring):
+                        self.params[k] = int(value)
+                    else:
+                        is_invalid = True
             else:
                 self.fail_json(msg="implementation error: unknown type %s requested for %s" % (wanted, k))