fix a test (need full name of CO molecule) and add better error message

Author: keflavich

astroquery/linelists/cdms/core.py

@@ -155,6 +155,11 @@ def query_lines_async(self, min_frequency, max_frequency, *,
                                  timeout=self.TIMEOUT, cache=cache)
         response.raise_for_status()
 
+        if 'Ups! Code: 011' in response.text:
+            raise InvalidQueryError("Specified query was invalid.  Check that"
+                                    " a valid molecule name was specified.  "
+                                    f"Payload was {payload}.")
+
         soup = BeautifulSoup(response.text, 'html.parser')
 
         ok = False

astroquery/linelists/cdms/tests/test_cdms.py

@@ -72,7 +72,9 @@ def test_query(patch_post):
     tbl = CDMS.query_lines(min_frequency=100 * u.GHz,
                            max_frequency=1000 * u.GHz,
                            min_strength=-500,
-                           molecule="CO")
+                           molecule="CO",
+                           parse_name_locally=True
+                           )
     assert isinstance(tbl, Table)
     assert len(tbl) == 8
     assert set(tbl.keys()) == colname_set