Redmine #2702: add missing uid/gid name mapping for hpux & aix

Tests 01_vars/02_functions/001.cf and 002.cf fail on HP-UX and AIX
because the hard classes don't cover the uid and gid mappings for
those platforms. This commit adds the necessary information to
allow the tests to pass on those two platforms.

HP-UX information was gathered from and tested on my own HP-UX
system, and for AIX see the following links for sample passwd
and group files:

http://pic.dhe.ibm.com/infocenter/aix/v6r1/index.jsp?topic=%2Fcom.ibm.aix.security%2Fdoc%2Fsecurity%2Fpasswords_etc_passwd_file.htm

http://www.rootunix.org/AIX/migrate.txt
Merge pull request #679 from mvpel/redmine_2702

Redmine #2702: add missing uid/gid name mapping for hpux & aix