Rename present to running, add new present state

The new present state just makes sure that a container exists, not that
it's running, although it get started one creation.
This is very useful for data volumes. This also changes the old
present, now running (default) state to only create the container if
it's not found, otherwise it just get started.

See also discussion on mailinglist:
https://groups.google.com/forum/#!topic/ansible-devel/jB84gdhPzLQ

This closes #6395

library/cloud/docker

@@ -148,7 +148,7 @@ options:
       - Set the state of the container
     required: false
     default: present
-    choices: [ "present", "stopped", "absent", "killed", "restarted" ]
+    choices: [ "present", "running", "stopped", "absent", "killed", "restarted" ]
     aliases: []
   privileged:
     description:
@@ -632,7 +632,7 @@ def main():
             env             = dict(),
             dns             = dict(),
             detach          = dict(default=True, type='bool'),
-            state           = dict(default='present', choices=['absent', 'present', 'stopped', 'killed', 'restarted']),
+            state           = dict(default='running', choices=['absent', 'present', 'running', 'stopped', 'killed', 'restarted']),
             debug           = dict(default=False, type='bool'),
             privileged      = dict(default=False, type='bool'),
             lxc_conf        = dict(default=None),
@@ -662,25 +662,35 @@ def main():
         changed = False
 
         # start/stop containers
-        if state == "present":
+        if state in [ "running", "present" ]:
-
+            
-            # make sure a container with `name` is running
+            # make sure a container with `name` exists, if not create and start it
-            if name and "/" + name not in map(lambda x: x.get('Name'), running_containers):
+            if name and "/" + name not in map(lambda x: x.get('Name'), deployed_containers):
                 containers = manager.create_containers(1)
-                manager.start_containers(containers)
+                if state == "present": #otherwise it get (re)started later anyways.. 
-
+                  manager.start_containers(containers)
-            # start more containers if we don't have enough
+                  running_containers = manager.get_running_containers()
-            elif delta > 0:
+                deployed_containers = manager.get_deployed_containers()
-                containers = manager.create_containers(delta)
+
-                manager.start_containers(containers)
+            if state == "running":
-
+                # make sure a container with `name` is running
-            # stop containers if we have too many
+                if name and "/" + name not in map(lambda x: x.get('Name'), running_containers):
-            elif delta < 0:
+                    manager.start_containers(deployed_containers)
-                containers_to_stop = running_containers[0:abs(delta)]
+    
-                containers = manager.stop_containers(containers_to_stop)
+                # start more containers if we don't have enough
-                manager.remove_containers(containers_to_stop)
+                elif delta > 0:
-
+                    containers = manager.create_containers(delta)
-            facts = manager.get_running_containers()
+                    manager.start_containers(containers)
+    
+                # stop containers if we have too many
+                elif delta < 0:
+                    containers_to_stop = running_containers[0:abs(delta)]
+                    containers = manager.stop_containers(containers_to_stop)
+                    manager.remove_containers(containers_to_stop)
+    
+                facts = manager.get_running_containers()
+            else:
+                acts = manager.get_deployed_containers()
 
         # stop and remove containers
         elif state == "absent":