1. A method for workload deployment density management for a multi-stage computing architecture implemented within a multi-tenant computing environment, the method comprising: receiving different requests from different tenants of a multi-tenant computing environment executing in memory of a host computing system of one or more physical servers each with memory and at least one processor, to deploy respectively different application instances of respectively different computer programs into different nodes of the host computing system; determining from each request an associated stage of a software lifecycle for a corresponding one of the application instances; and, deploying each of the application instances into a particular one of the nodes depending upon an associated stage of each of the application instances so that each of the nodes hosts different application instances for different tenants of a common stage of the software lifecycle.