Fix unstable ClientInterface test
Fix unstable ClientInterface test

Occasionally ClientInterface tests would fail due to
Tabris#$sendLogBufferInternal being executed by a timer at random
times. This should fix that by calling "close" after each test.

Change-Id: Ia67c5829b1c9ee5b40f361764840bf32fc16c492

eclipsesource/tabris-js,eclipsesource/tabris-js,eclipsesource/tabris-js