[COOK-2519] - allow string for priority
[COOK-2519] - allow string for priority

chef-cookbooks/yum,someara/yum,hippolin/yum-cookbook,GannettDigital/chef-yum,mrb/yum,ketan/yum,juliandunn/yum,edmunds-chef/yum,xacaxulu/yum,GannettDigital/chef-yum,mattray/yum,vkhatri/yum,autotraderuk/yum,hippolin/yum-cookbook,mrb/yum,vkhatri/yum,vkhatri/yum,h4ck3rm1k3/yum,someara/yum,someara/yum,stan928/yum,h4ck3rm1k3/yum,ketan/yum,stan928/yum,mattray/yum,ketan/yum,h4ck3rm1k3/yum,edmunds-chef/yum,mattray/yum,autotraderuk/yum,mrb/yum,juliandunn/yum,GannettDigital/chef-yum,criteo-forks/yum,streamlinesocial/yum,autotraderuk/yum,ikkyotech/OpsworksNodeAddons,xacaxulu/yum,xacaxulu/yum,chef-cookbooks/yum,stan928/yum,edmunds-chef/yum,criteo-forks/yum,ikkyotech/OpsworksNodeAddons,hippolin/yum-cookbook