Add 'vgoptions' parameter to lvg module.

Allows specifying extra flags to pass to `vgcreate`.

library/system/lvg

@@ -41,6 +41,12 @@ options:
     - The size of the physical extent in megabytes. Must be a power of 2.
     default: 4
     required: false
+  vgoptions:
+    description:
+    - Additional options to pass to C(vgcreate) when creating the volume group.
+    default: null
+    required: false
+    version_added: "1.5"
   state:
     choices: [ "present", "absent" ]
     default: present
@@ -99,6 +105,7 @@ def main():
             vg=dict(required=True),
             pvs=dict(type='list'),
             pesize=dict(type='int', default=4),
+            vgoptions=dict(),
             state=dict(choices=["absent", "present"], default='present'),
             force=dict(type='bool', default='no'),
         ),
@@ -109,6 +116,7 @@ def main():
     state = module.params['state']
     force = module.boolean(module.params['force'])
     pesize = module.params['pesize']
+    vgoptions = module.params.get('vgoptions', '').split()
 
     if module.params['pvs']:
         dev_string = ' '.join(module.params['pvs'])
@@ -168,7 +176,7 @@ def main():
                     else:
                         module.fail_json(msg="Creating physical volume '%s' failed"%current_dev, rc=rc, err=err)
                 vgcreate_cmd = module.get_bin_path('vgcreate')
-                rc,_,err = module.run_command("%s -s %s %s %s"%(vgcreate_cmd, pesize, vg, dev_string))
+                rc,_,err = module.run_command([vgcreate_cmd] + vgoptions + ['-s', str(pesize), vg, dev_string])
                 if rc == 0:
                     changed = True
                 else: