(maint) Add debugging message to hook execution
(maint) Add debugging message to hook execution

Previously when developing on the Debug Server it was not easy to see when hooks
were being triggered.  This commit adds a start and finish debug message when
hooks are triggered, except for the log message hook as this just generates a
lot of noise.

jpogran/puppet-vscode,jpogran/puppet-vscode,glennsarti/puppet-vscode