Save time in import tests by not pushing.

It's not necessary for the test.

t/import/* test times drop from ~2m to ~1m 30s.
Adding debugging diags to figure out why this test is failing on Travis.

t/import/version_normalization.t ........... Attempt to free unreferenced scalar: SV 0x6a006c0 at /home/travis/perl5/perlbrew/perls/5.18/lib/5.18.2/Test/Builder.pm line 245.
Bizarre copy of UNKNOWN in return at /home/travis/build/evalEmpire/gitpan/blib/lib/Gitpan/Dist.pm line 169.
t/import/version_normalization.t ........... Dubious, test returned 25 (wstat 6400, 0x1900)
No subtests run