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.

twisted/plugins/sat_plugin.py

@@ -36,7 +36,7 @@ def initialise(options):
     """Method to initialise global modules"""
     # XXX: We need to configure logs before any log method is used, so here is the best place.
     from sat.core import log_config
-    log_config.satConfigure(C.LOG_BACKEND_TWISTED, C, backend_data=options)
+    log_config.sat_configure(C.LOG_BACKEND_TWISTED, C, backend_data=options)
 
 
 class Options(usage.Options):
@@ -50,7 +50,7 @@ class SatMaker:
     description = _("%s XMPP client backend") % C.APP_NAME_FULL
     options = Options
 
-    def setDebugger(self):
+    def set_debugger(self):
         from twisted.internet import defer
         if defer.Deferred.debug:
             # if we are in debug mode, we want to use ipdb instead of pdb
@@ -65,7 +65,7 @@ class SatMaker:
     def makeService(self, options):
         from twisted.internet import asyncioreactor
         asyncioreactor.install()
-        self.setDebugger()
+        self.set_debugger()
         # XXX: Libervia must be imported after log configuration,
         #      because it write stuff to logs
         initialise(options.parent)