Add missing dependencies.
Add missing dependencies.

Installing lava-server needs psycopg2.
dateutil is needed too but there are problems
which prevent the use of this in setup.py

Change-Id: I823ebc015d024295b8a8669862969fb1d76cd2d1
Reviewed-on: http://review.linaro.org/594
Reviewed-by: lava-bot <f1c518755f92a4c3b69132fe31fc3cc1dae5545f@linaro.org>
Reviewed-by: Stevan Radaković <33f9dd6baa06800e337711f1ba9a74a68b30bd64@linaro.org>

Linaro/lava-server,OSSystems/lava-server,Linaro/lava-server,Linaro/lava-server,OSSystems/lava-server,OSSystems/lava-server,Linaro/lava-server