Fix ssh key existence test.
Fix ssh key existence test.

ch1c4um/pfsense,pfsense/pfsense,NOYB/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,brunostein/pfsense,NewEraCracker/pfsense,NOYB/pfsense,pfsense/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,pfsense/pfsense,brunostein/pfsense,dennypage/pfsense,NewEraCracker/pfsense,pfsense/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,jxmx/pfsense,ch1c4um/pfsense,brunostein/pfsense,jxmx/pfsense,ptorsten/pfsense,phil-davis/pfsense,dennypage/pfsense,dennypage/pfsense,ch1c4um/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,phil-davis/pfsense,jxmx/pfsense,NOYB/pfsense,ptorsten/pfsense