refactor NRAO to use real querying and fix telescope config parsing

Author: keflavich

astroquery/nrao/core.py

@@ -197,6 +197,7 @@ def _args_to_payload(self, **kwargs):
     @prepend_docstr_noreturns(_args_to_payload.__doc__)
     def query_async(self,
                     get_query_payload=False,
+                    cache=True,
                     **kwargs):
         """
         Returns
@@ -209,10 +210,8 @@ def query_async(self,
 
         if get_query_payload:
             return request_payload
-        response = commons.send_request(Nrao.DATA_URL,
-                                        request_payload,
-                                        Nrao.TIMEOUT,
-                                        request_type='POST')
+        response = self._request('POST', self.DATA_URL, params=request_payload,
+                                 timeout=self.TIMEOUT, cache=cache)
         return response
 
     @prepend_docstr_noreturns(_args_to_payload.__doc__)
@@ -255,9 +254,9 @@ def _parse_result(self, response, verbose=False):
         new_content = degrees_re.sub(r'unit="degrees"  datatype="char" '
                                      'arraysize="*"', new_content)
         telconfig_re = re.compile(r'datatype="char"  name="Telescope:config"')
-        new_content = telconfig_re.sub(r'datatype="char"'
-                                       'name="Telescope:config"'
-                                       ' arraysize="*"', new_content)
+        new_content = telconfig_re.sub(r'datatype="unicodeChar" '
+                                       'name="Telescope:config" '
+                                       ' arraysize="*" ', new_content)
 
         datatype_mapping = {'integer':'long'}