Only 20 connectors are returned at most when creating a connection

This is a…

[ ] Feature request
[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report  
[ ] Documentation issue or request

The problem

When you install a few extensions that add connectors you’ll quickly find that some connectors vanish from the list of available connectors when you go to create a connection.

With a bit of testing by slowly adding connector extensions I found that the API response for /connectors appears to have a maximum limit of 20.

Expected behavior

All connectors should be returned as the 1st page of the create connection wizard doesn’t do pagination.

Tasks involved / Steps to Reproduce

1. Open up the browser developer console and look at the network tab, check the “Preview” tab for the HTTP request to /connectors
2. Add a connector extension, note how the totalCount in the response increases by 1
3. Add more connector extensions so that you have more than 20 connectors
4. Note that totalCount stops at 20, and some connectors that were available are now missing.

[gashcrumb]

Yup, can do thanks!

[gashcrumb]

Created https://github.com/syndesisio/syndesis/issues/3113 to track improving pagination.