qapi: Rename pragma *-whitelist to *-exceptions

Rename pragma returns-whitelist to command-returns-exceptions, and
name-case-whitelist to member-name-case-exceptions.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210323094025.3569441-20-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

scripts/qapi/source.py

@@ -21,10 +21,10 @@ class QAPISchemaPragma:
     def __init__(self) -> None:
         # Are documentation comments required?
         self.doc_required = False
-        # Whitelist of commands allowed to return a non-dictionary
-        self.returns_whitelist: List[str] = []
-        # Whitelist of entities allowed to violate case conventions
-        self.name_case_whitelist: List[str] = []
+        # Commands allowed to return a non-dictionary
+        self.command_returns_exceptions: List[str] = []
+        # Types whose member names may violate case conventions
+        self.member_name_exceptions: List[str] = []
 
 
 class QAPISourceInfo: