(FM-7496) fix for running apply runs from a PE/PS installation

[Thomas-Franklin]

If running on a puppetserver it will be unable to locate the base provider panos_provider, this commit uses require_relative which will allow it to work on a puppetserver.

[codecov]

Codecov Report

Merging #66 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #66   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          36     36           
  Lines         831    808   -23     
=====================================
- Hits          831    808   -23

Impacted Files	Coverage Δ
lib/puppet/provider/panos_path_monitor_base.rb	100% <100%> (ø)	⬆️
...ppet/provider/panos_nat_policy/panos_nat_policy.rb	100% <100%> (ø)	⬆️
...rovider/panos_service_group/panos_service_group.rb	100% <100%> (ø)	⬆️
.../provider/panos_static_route/panos_static_route.rb	100% <100%> (ø)	⬆️
...rovider/panos_address_group/panos_address_group.rb	100% <100%> (ø)	⬆️
...vider/panos_virtual_router/panos_virtual_router.rb	100% <100%> (ø)	⬆️
lib/puppet/provider/panos_service/panos_service.rb	100% <100%> (ø)	⬆️
...panos_ipv6_static_route/panos_ipv6_static_route.rb	100% <100%> (ø)	⬆️
lib/puppet/provider/panos_static_route_base.rb	100% <100%> (ø)	⬆️
...nos_arbitrary_commands/panos_arbitrary_commands.rb	100% <100%> (ø)	⬆️
... and 8 more

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[DavidS]

👍