Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/f27ca07e00e6
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11670 from lightsofapollo/fix-the-ting

update test-agent

========

https://hg.mozilla.org/integration/gaia-central/rev/17c2f8096a8a
Author: James Lal <james@lightsofapollo.com>
Desc: update test-agent