Change delimiter for multiple namespaces and tags

Change delimiter for multiple namespaces and tags

It's ; for namespaces (since that is generally what we're using,
e.g. for STRING_OPTIONS), and | for tags.  I would have
preferred them to all be consistent, but there is one revision
that has a ;, and this seems better than modifying the DB.

Comma is already used as a delimiter between separate parameters
(e.g. hideanons and namepsace).

Also, fix multiple namespaces for parseParameters and add test
cases.

Bug: T164132
Bug: T164133
Change-Id: Iad061e0bc17e3522a3f5d330ac2c8bf9cf0e614f