enable logging of all output

if you have command like:
rm -f /var/lib/pulp/init.flag; service-wait httpd stop; service-wait mongod stop; rm -f /var/lib/mongodb/pulp_database*; service-wait mongod start; rm -rf /var/lib/pulp/{distributions,published,repos}/*; true
and let say service-wait fail, no output will be logged.
With this change the main.log grow by 30 lines, which has no impact
add service-wait to path

addressing:
130108-10:42:22 debug: Executing 'rm -f /var/lib/pulp/init.flag; service-wait httpd stop; service-wait mongod stop; rm -f /var/lib/mongodb/pulp_database*; service-wait mongod start; rm -rf /var/lib/pulp/{distributions,published,repos}/*; true'
130108-10:42:22 notice: /Stage[main]/Pulp::Config/Exec[reset_pulp_db]/returns: sh: service-wait: command not found
130108-10:42:22 notice: /Stage[main]/Pulp::Config/Exec[reset_pulp_db]/returns: sh: service-wait: command not found
130108-10:42:22 notice: /Stage[main]/Pulp::Config/Exec[reset_pulp_db]/returns: sh: service-wait: command not found
do not continue if something fails

service-wait returns 0 on sucess despite previous state and rm -f returns 0 even if file previously do not exists, so if something fail it is probably serious
Merge pull request #1370 from xsuchy/pull-req-fix785

add service-wait to path and enable logging of katello-configure