travis: add verbose config to perl test suite for Ubuntu Worker All Modules

travis: add verbose config to perl test suite for Ubuntu Worker All Modules

For some reason we get sporadic failures only in Ubuntu Worker All Modules' test:

t/apache/rwrite.t ................... 53/? # Failed test 113 in /home/travis/build/apache/httpd/test/perl-framework/blib/lib/Apache/TestCommon.pm at line 56 fail #113
t/apache/rwrite.t ................... Failed 1/114 subtests

Recent examples:
https://travis-ci.org/apache/httpd/jobs/632425202
https://travis-ci.org/apache/httpd/jobs/633250739

Add "-verbose" as test option to capture more data about the failure
when it happens.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1872389 13f79535-47bb-0310-9956-ffa450edef68