Update travis-ci config

- clean up and remove trunk from path in .travis.yml
- update Makefile
- add DBD::mysql to travis prereqs
Makefile: use perlbrew built-in install-cpanm

The Travis-CI code should use the installation code provided
by perlbrew rather than grabbing cpanm directly with curl.
add ogflow.pl
Initial work on Enrollment workflow

- Grab enrollment workflow from customer repo
- Rework make files for ogflow.pl
Add classes to enroll wf test
Change class for 'load recent certificates'
Update enrollment wf xml
Implement GetCert command in SCEPv2

Note - due to lack of bigint capability in sscep untested with serials >64bit