Add mirror to list of icinga smokey checks again
Add mirror to list of icinga smokey checks again

PR #1737 suffered from the problem that nagio_check_cache.py could not
read the Scenario Outline output. I have reverted the mirror checks in
Smokey to use regular Scenarios.

I tested it after deploying Smokey to staging (and production), so we
are good to enable this Icinga check again.

```
root@monitoring-1:/opt/smokey# ./nagios_check_cache.py mirror high
/tmp/smokey.json
OK: 0 failed, 0 skipped, 8 passed;

2014-05-13 11:06:26:  Scenario: Check homepage is served by all the
mirrors (features/mirror.feature/@high)
2014-05-13 11:06:26:    Step: [PASS] Given there are 2 mirrors and 2
providers
2014-05-13 11:06:26:    Step: [PASS] Then I should get a 200 response
from "/" on the mirrors
2014-05-13 11:06:26:
2014-05-13 11:06:26:  Scenario: Check a deep-linked page is served by
all the mirrors (features/mirror.feature/@high)
2014-05-13 11:06:26:    Step: [PASS] Given there are 2 mirrors and 2
providers
2014-05-13 11:06:26:    Step: [PASS] Then I should get a 200 response
from "/council-tax-reduction" on the mirrors
2014-05-13 11:06:26:
2014-05-13 11:06:26:  Scenario: Check a non-existent page returns a
service-unavailable error from all the mirrors
(features/mirror.feature/@high)
2014-05-13 11:06:26:    Step: [PASS] Given there are 2 mirrors and 2
providers
2014-05-13 11:06:26:    Step: [PASS] Then I should get a 503 response
from "/jasdu3jjasd" on the mirrors
2014-05-13 11:06:26:
2014-05-13 11:06:26:  Scenario: Check that search returns an error on
all the mirrors (features/mirror.feature/@high)
2014-05-13 11:06:26:    Step: [PASS] Given there are 2 mirrors and 2
providers
2014-05-13 11:06:26:    Step: [PASS] Then I should get a 503 response
from "/search" on the mirrors
2014-05-13 11:06:26:
```

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet