[py] Making path to selenium server independent of the current working dir

Author: barancev

py/conftest.py

@@ -189,7 +189,8 @@ def server(request):
 
     _host = 'localhost'
     _port = 4444
-    _path = '../bazel-bin/java/server/src/org/openqa/selenium/grid/selenium_server_deploy.jar'
+    _path = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+                         'bazel-bin/java/server/src/org/openqa/selenium/grid/selenium_server_deploy.jar')
 
     def wait_for_server(url, timeout):
         start = time.time()