This patch address the case of validating resources like memory_mb and cpus that have same values but doesn't have same type, for example, in case of node's memory_mb and cpus registered as unicode after an inspection process. In this patch we convert the data into to string, making possible the values pass in the validation when correct. Change-Id: I014ace14cb315444643c7e2c8d5b43b01cc7ef86