Revert "make travis parallel"

This reverts commit 9183a5fa1558f9e217b8d0f18536208a47648266.
Use message bus with stringified keys
use allowy for service binding permissions
use allowy for service plan visibility permissions
use allowy for service plan permissions
use allowy for service permissions

Legacy service gateway is now using a v2 security context
Remove deprecated-by-allowy permission sets
remove old permissions code
remove duplicate permission tests from some controllers
remove duplicate permission checks from all controllers
Allow Events to be queried by timestamp and type

[finishes #54656170]

* Added ability to query Events by timestamp and type of event.
* Added indices to the `timestamp` and `type` columns on the `events`
  table.

A new URL query operator has been added that allows the returning of records
that have an attribute in an array of possible values (essentially mapping to
the `IN` SQL operator). This syntax can be used as follows (pre URL escaping):

    /model?q=color IN red,blue

Further documentation about this new operator and its features and limitations
can be found in the `docs/API_Overview.md` document.