Create 'suites' directory, test re-org

[Paul-Ferrell]

We should add a new config dir - suites, and deprecate the test_src and tests directory.

In a suites directory:

• a single yaml file can contain a suite named for that file (as per tests currently)

• a directory, containing:

  • a suite.yaml file (required), with the suite configuration.
  • a hosts.yaml file (optional) containing host specific configs (unlike regular hosts files, these will have multiple configs (see below)
  • a modes.yaml file (option) with multiple modes
  • an os.yaml file (option) with OS options

• Pavilion should look in the suite directory first for any source files

  • If a source path should default to the series' directory if no path or download is specified.
  • The yaml files listed above should be ignored when calculating the build hash.

Host/Mode Files

The host and mode files in a suite directory should have the same format as a test, except the keys should be host/mode/os names.

rocinante:
  variables:
    foo: 'bar'

crossroads:
  variables:
    foo: 'baz'