Access to Memory (AtoM)

This was causing issues in our EAD / finding aid generation because it uses the site base URL and inserts it into XML.

1. Run php symfony tools:purge --url="\"http://hi.com\""
2. The base URL will be accepted as "http://hi.com" with quotes around it
3. Create a record in AtoM
4. Export the EAD

Result:

The XML will choke since the quote in the base URL is escaping the string when EAD is being generated.

Expected result:

For us to do validation in tools:purge to make sure malformed URLs don't sneak in that way