Increased expected time limit to 10 seconds.

Change-Id: Ie6b66d7f16d1802df8036035857eb311db34ec21
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform/+/190040
Tested-by: Platform Bot <platform-bot@eclipse.org>