ctf: Disable NLS warnings in test plugin

ctf: Disable NLS warnings in test plugin

Test plugins are never meant to be shipped to end-users, so
instead of having to put $NON-NLS-1$ and SuppressWarnings
everywhere, just disable those in the project settings instead.

Change-Id: Ifc9d23e4ce9944fb03cb8c019dd5176d2247a70e
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/11214
Tested-by: Hudson CI
Reviewed-by: Bernd Hufmann <bhufmann@gmail.com>
IP-Clean: Bernd Hufmann <bhufmann@gmail.com>