Update the shared queries collection when a new query is created
Remove the shared queries link and data file from mock directory

There is no longer a distinction between queries and shared queries
as far as Serrano is concerned.
Replace shared_queries references with the queries collection

Serrano has merged the two endpoints so Cilantro will only need to
maintain the single queries collection.
Merge pull request #296 from cbmi/issue-286

Update the shared queries collection when a new query is created