tweak Austrian (AT) remove "Politischer Bezirk", with test

Author: freyfogle

conf/countries/worldwide.yaml

@@ -337,6 +337,8 @@ AS:
 # Austria
 AT:
     address_template: *generic1
+    replace:
+        - ["^Politischer Bezirk ",""]
 
 # Australia
 AU:

testcases/countries/at.yaml

@@ -14,4 +14,16 @@ expected:  |
     Stauffenstraße 5
     5020 Salzburg
     Austria
+---
+description: clean up Politischer Bezirk
+components:
+    country: Austria
+    country_code: at
+    county: Politischer Bezirk Schärding
+    local_administrative_area: Riedau
+    state: Upper Austria
+expected:  |
+    Riedau
+    Schärding
+    Austria