massive refactoring to switch from camelCase to snake_case:

historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a
pre-PEP8 code, to use the same coding style as in Twisted.

However, snake_case is more readable and it's better to follow PEP8 best practices, so it
has been decided to move on full snake_case. Because Libervia has a huge codebase, this
ended with a ugly mix of camelCase and snake_case.

To fix that, this patch does a big refactoring by renaming every function and method
(including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case.

This is a massive change, and may result in some bugs.

sat/plugins/plugin_exp_pubsub_admin.py

@@ -49,8 +49,8 @@ class PubsubAdmin(object):
 
     def __init__(self, host):
         self.host = host
-        host.bridge.addMethod(
-            "psAdminItemsSend",
+        host.bridge.add_method(
+            "ps_admin_items_send",
             ".plugin",
             in_sign="ssasss",
             out_sign="as",
@@ -60,7 +60,7 @@ class PubsubAdmin(object):
 
     def _publish(self, service, nodeIdentifier, items, extra=None,
                  profile_key=C.PROF_KEY_NONE):
-        client = self.host.getClient(profile_key)
+        client = self.host.get_client(profile_key)
         service = None if not service else jid.JID(service)
         extra = data_format.deserialise(extra)
         items = [generic.parseXml(i.encode('utf-8')) for i in items]
@@ -68,7 +68,7 @@ class PubsubAdmin(object):
             client, service, nodeIdentifier, items, extra
         )
 
-    def _sendCb(self, iq_result):
+    def _send_cb(self, iq_result):
         publish_elt = iq_result.admin.pubsub.publish
         ids = []
         for item_elt in publish_elt.elements(pubsub.NS_PUBSUB, 'item'):
@@ -90,5 +90,5 @@ class PubsubAdmin(object):
         for item in items:
             publish_elt.addChild(item)
         d = iq_elt.send()
-        d.addCallback(self._sendCb)
+        d.addCallback(self._send_cb)
         return d