Oss license support for ent builds (#8054)

* changes necessary to support oss licesning shims

revert nomad fmt changes

update test to work with enterprise changes

update tests to work with new ent enforcements

make check

update cas test to use scheduler algorithm

back out preemption changes

add comments

* remove unused method

command/agent/agent.go

@@ -59,6 +59,9 @@ type Agent struct {
 	httpLogger log.Logger
 	logOutput  io.Writer
 
+	// EnterpriseAgent holds information and methods for enterprise functionality
+	EnterpriseAgent *EnterpriseAgent
+
 	// consulService is Nomad's custom Consul client for managing services
 	// and checks.
 	consulService *consul.ServiceClient
@@ -121,6 +124,7 @@ func NewAgent(config *Config, logger log.InterceptLogger, logOutput io.Writer, i
 	if err := a.setupClient(); err != nil {
 		return nil, err
 	}
+
 	if err := a.setupEnterpriseAgent(logger); err != nil {
 		return nil, err
 	}