startprovider command generates legacy stuff

The legacy stuff includes:
- whitelists
- description fields (instead of 3-step)

Oh, and validation fails on a freshly created provider:

???: error: Cannot load job definitions from '/home/kissiel/providers/2016.this.will:fail/units/examples-intermediate.pxu': Unexpected multi-line value (examples-intermediate.pxu, line 5)
???: error: Cannot load job definitions from '/home/kissiel/providers/2016.this.will:fail/units/examples-normal.pxu': Unexpected multi-line value (examples-normal.pxu, line 5)
???: error: Cannot load job definitions from '/home/kissiel/providers/2016.this.will:fail/units/examples-intermediate.pxu': Unexpected multi-line value (examples-intermediate.pxu, line 5)
???: error: Cannot load job definitions from '/home/kissiel/providers/2016.this.will:fail/units/examples-normal.pxu': Unexpected multi-line value (examples-normal.pxu, line 5)
NOTE: subsequent units from problematic files are ignored
units/examples-trivial.pxu:14-25: advice: job 'always-pass', field 'flags', please ensure that the command supports non-C locale then set the preserve-locale flag
units/examples-trivial.pxu:27-38: advice: job 'always-fail', field 'flags', please ensure that the command supports non-C locale then set the preserve-locale flag
whitelists/normal.whitelist:2: advice: test plan 'normal', field 'include', selector '^2016.this.will::examples/normal/.*$' may not match any known or generated job
whitelists/trivial.whitelist:2: advice: test plan 'trivial', field 'include', selector '2016.this.will::examples/trivial/always-pass' may not match any known or generated job
whitelists/trivial.whitelist:3: advice: test plan 'trivial', field 'include', selector '2016.this.will::examples/trivial/always-fail' may not match any known or generated job
Validation of provider 2016.this.will:fail has failed