Update method name in launchd provider unit tests.
Update method name in launchd provider unit tests.

Signed-off-by: Pete Higgins <e3b6cda228242c30b711ac17cb264f1dbadfd0b6@peterhiggins.org>

gene1wood/chef,mattray/chef,mwrock/chef,mattray/chef,jaymzh/chef,gene1wood/chef,nvwls/chef,MsysTechnologiesllc/chef,nvwls/chef,mattray/chef,MsysTechnologiesllc/chef,MsysTechnologiesllc/chef,nvwls/chef,chef/chef,chef/chef,tas50/chef-1,jaymzh/chef,MsysTechnologiesllc/chef,chef/chef,higanworks/chef,higanworks/chef,chef/chef,higanworks/chef,mattray/chef,gene1wood/chef,higanworks/chef,mwrock/chef,gene1wood/chef,tas50/chef-1,mwrock/chef,tas50/chef-1,higanworks/chef,jaymzh/chef,jaymzh/chef,mwrock/chef,nvwls/chef,tas50/chef-1,nvwls/chef,nvwls/chef,mattray/chef