Remove dependency on PSConfig Perl Code

[arlake228]

libperfsonar-toolkit-perl requires perfsonar-psconfig-pscheduler-devel which no longer exists. Most of the Perl PSConfig libraries already live in perl shared, this was just one strange edge case. The code that needs it is reading one field out of a local JSON file, so should be easy to just replace with normal json file parsing pattern.

See

perl-shared/libperfsonar/libperfsonar/lib/perfSONAR_PS/NPToolkit/DataService/Host.pm

Line 624 in df0ee6c

sub get_templates {