Move EntityValidators to correct namespace.

Change-Id: I69fd036187efcc9114504a2ad5bc71fda7953195
Localisation updates from https://translatewiki.net.

Change-Id: Idc2403c6f63f8347fcb0e345431354e21797f4f8
Merge "Move EntityValidators to correct namespace."
Allow reseting WikibaseClient's default instance

This breaks tests as they rely on being able to change this
mid-request.

Change-Id: I814c05243515f0babd153bded344ec2a124e6a65
remove travis notifications

Change-Id: I3d227b6b7a138d748b785b1572db3e8a81e49e46
specify phpunit version for travis

Change-Id: Iff584904a5afe12092d0abea9ae8f03b5cbb49d6