Convert old rest stack: appkernels module

[jsperhac]

This is a step along the way toward killing off the old REST stack.

Description

Convert internal dashboard application kernel functionality to call the NewRest rest stack endpoint. Then, remove source code from the old classes/REST/akrr rest stack. This is a tidier implementation of my old pull request #422 from the xdmod-private ccr repo.

Refer to pull requests against

• xdmod (Convert old rest stack: base xdmod xdmod#73), that: removes entirely-unused source code from the old classes/REST rest stack, and removes associated documentation, html/rest_catalog/
• and xdmod-supremm (Convert old rest stack: supremm module xdmod-supremm#28), that converts another old REST stack remnants to use the NewRest controllers.

Motivation and Context

• Head in the direction of reducing 3 rest stacks to 2 rest stacks
• I'm tired of dead, duplicated, unused code.

Tests performed

Front-end was tested in grotesque detail by submitter and by Bob, in November 2016.

Changes are limited to effecting the internal dashboard, namely, to the code that populates drop-down menus for resources and kernels in the Walltime and Schedule areas. These were tested by hand to verify, using chrome debugger to observe which rest endpoints are in use. Finally, tests for the endpoints effected here have been added and use the integration test harness.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project as found in the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Caveats:

More things I'd like to do related to the rest stacks:

• Introduce improved logging for the NewRest controllers

To Do:

Remaining to do in this exercise:

• see pull requests named "convert-old-rest-stack" for supremm and base xdmod modules.

[plessbd]

As long as this works, LGTM

[plessbd]

Will this work? $data is an array and we are asserting that it is >= 1