Rakku stackadmin issue (#7852)

* network admin module changes

* remove readme.azsautogen.md from network

* rename new[ModuleName] to [ModuleName]Definition for AcquiredPlan, DirectoryTenant, Offer, OfferDelegation, Plan and Subscription

* fix for enum naming error in github issue #7822

specification/azsadmin/resource-manager/subscriptions/Microsoft.Subscriptions.Admin/preview/2015-11-01/Manifest.json

@@ -662,7 +662,7 @@
         "Enabled"
       ],
       "x-ms-enum": {
-        "name": "ResourceDeletionPolicy",
+        "name": "LinkedAction",
         "modelAsString": true,
         "values": [
           {
@@ -875,7 +875,7 @@
         "Succeeded"
       ],
       "x-ms-enum": {
-        "name": "MetricPrimaryAggregationType",
+        "name": "ManifestProvisioningState",
         "modelAsString": true,
         "values": [
           {