Apply consistent parameter alises to hg and subversion

For issue #3372, apply consistent parameter aliases to source_control
modules.  For hg, add name and version and add to documentation string.
For subversion, add version and document version and name aliases in
documentation string.

library/source_control/hg

@@ -41,6 +41,7 @@ options:
             - The repository address.
         required: true
         default: null
+        aliases: [ name ]
     dest:
         description:
             - Absolute path of where the repository should be cloned to.
@@ -52,6 +53,7 @@ options:
               branch name or even tag. 
         required: false
         default: "default"
+        aliases: [ version ]
     force:
         description:
             - Discards uncommitted changes. Runs C(hg update -C).
@@ -203,9 +205,9 @@ def switch_version(module, dest, revision):
 def main():
     module = AnsibleModule(
         argument_spec = dict(
-            repo = dict(required=True),	    
+            repo = dict(required=True, aliases=['name']),
             dest = dict(required=True),
-            revision = dict(default="default"),
+            revision = dict(default="default", aliases=['version']),
             force = dict(default='yes', type='bool'),
             purge = dict(default='no', type='bool')
         ),

library/source_control/subversion

@@ -34,6 +34,7 @@ options:
     description:
       - The subversion URL to the repository.
     required: true
+    aliases: [ name, repository ]
     default: null
   dest:
     description:
@@ -45,6 +46,7 @@ options:
       - Specific revision to checkout.
     required: false
     default: HEAD
+    aliases: [ version ]
   force:
     description:
       - If C(yes), modified files will be discarded. If C(no), module will fail if it encounters modified files.
@@ -141,7 +143,7 @@ def main():
         argument_spec=dict(
             dest=dict(required=True),
             repo=dict(required=True, aliases=['name', 'repository']),
-            revision=dict(default='HEAD', aliases=['rev']),
+            revision=dict(default='HEAD', aliases=['rev', 'version']),
             force=dict(default='yes', type='bool'),
             username=dict(required=False),
             password=dict(required=False),