Web UI integration tests: PEP8 fixes

Tests modified to comply with PEP8 rules with exception of rule E501 (long lines).
Done by autopep8 tool and 2 manual modifications.

https://fedorahosted.org/freeipa/ticket/3744

ipatests/test_webui/test_realmdomains.py

@@ -25,6 +25,7 @@ from ipatests.test_webui.ui_driver import UI_driver
 
 ENTITY = 'realmdomains'
 
+
 class test_realmdomains(UI_driver):
 
     def test_read(self):
@@ -45,4 +46,4 @@ class test_realmdomains(UI_driver):
         self.facet_button_click('update')
         self.dialog_button_click('force')
         self.wait_for_request()
-        self.wait_for_request()
+        self.wait_for_request()