Wait till vm ipaddress isn't empty or nil

Fixes #47

Author: olegz-alertlogic

lib/vSphere/action/get_ssh_info.rb

@@ -26,7 +26,7 @@ def get_ssh_info(connection, machine)
           vm = get_vm_by_uuid connection, machine
 
           return nil if vm.nil?
-
+          return nil if vm.guest.ipAddress.nil? || vm.guest.ipAddress.empty?
           return {
               :host => vm.guest.ipAddress,
               :port => 22
@@ -35,4 +35,4 @@ def get_ssh_info(connection, machine)
       end
     end
   end
-end
+end