move getParameter method from ProxyClient to SecopClient

+ remove unneccessary x mode for some py files

Change-Id: Iaca31fc35ef57805e68e0404c1c7d3240a15f11a
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/22571
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop/client/__init__.py

@@ -171,15 +171,6 @@ class ProxyClient:
         self.callback(module, 'updateEvent', module, param, value, timestamp, readerror)
         self.callback((module, param), 'updateEvent', module, param, value, timestamp, readerror)
 
-    def getParameter(self, module, parameter, trycache=False):
-        if trycache:
-            cached = self.cache.get((module, parameter), None)
-            if cached:
-                return cached
-        if self.online:
-            self.readParameter(module, parameter)
-        return self.cache[module, parameter]
-
 
 class SecopClient(ProxyClient):
     """a general SECoP client"""
@@ -509,6 +500,15 @@ class SecopClient(ProxyClient):
             pass
         return self.cache.get((module, parameter), None)
 
+    def getParameter(self, module, parameter, trycache=False):
+        if trycache:
+            cached = self.cache.get((module, parameter), None)
+            if cached:
+                return cached
+        if self.online:
+            self.readParameter(module, parameter)
+        return self.cache[module, parameter]
+
     def setParameter(self, module, parameter, value):
         self.connect()  # make sure we are connected
         datatype = self.modules[module]['parameters'][parameter]['datatype']