Rename test files and delete epics modules

Author: shihab-dls

tests/fastcs/eiger/test_eiger_controller.py

@@ -31,7 +31,7 @@ def become_ready_on_arm(*args, **kwargs):
         if args[0] == 1:
             set_mock_value(driver.state, "ready")
 
-    callback_on_mock_put(driver.arm, become_ready_on_arm)
+    callback_on_mock_put(controller._drv.arm, become_ready_on_arm)
 
     return driver, controller