[Linaro-validation] using latest lava-android-test

From IRC earlier:

<liuyq> asac, :( it will not work now, the branches has not been deployed. Also I haven't merged yet:(

<asac> liuyq: we have to always deployt? thought we always pull latest from bzr <asac> we should always have access to all the latest tests without another deploy step <asac> doanac: ^^ new requirement it seems

I wanted to discuss here and make sure I'm clear. We basically need to stop using the lava-android-test published to pip and start always pulling lava-android-test from trunk?