change version to 1.1.0.alpha1 in configure.ac

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
tests: Fix unpriv test

Don't use $TUSER as it's not defined. Also don't include
lxc-test-usernic in extra_DIST.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>