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/memory/crypto.py

@@ -47,7 +47,7 @@ class BlockCipher:
         """
         if leave_empty and text == "":
             return ""
-        iv = BlockCipher.getRandomKey()
+        iv = BlockCipher.get_random_key()
         key = key.encode()
         key = (
             key[: BlockCipher.MAX_KEY_SIZE]
@@ -91,7 +91,7 @@ class BlockCipher:
         return BlockCipher.unpad(decrypted)
 
     @staticmethod
-    def getRandomKey(size=None, base64=False):
+    def get_random_key(size=None, base64=False):
         """Return a random key suitable for block cipher encryption.
 
         Note: a good value for the key length is to make it as long as the block size.