rename framework methods to camelCase

for easier distinction:
- camelCase or singleword: framework method
- snake_case: driver method

(driver) parameters are lowercase, single word framework variables may
have to start with uppercase letters to distinguish...

Change-Id: I76536b6390324625b242c4f190553014c2ca61d6
Reviewed-on: https://forge.frm2.tum.de/review/20295
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop_demo/cryo.py

@@ -136,7 +136,7 @@ class Cryostat(CryoBase):
             special='content of special property'),
     )
 
-    def init_module(self):
+    def initModule(self):
         self._stopflag = False
         self._thread = mkthread(self.thread)