Revert "Revert: spec changes for Library Management in bigDataPool (#… (#12118)

* Revert "Revert: spec changes for Libmary Management in bigDataPool (#11612)"

This reverts commit 7c8fd7f.

* custom libraries schema reference changed

Co-authored-by: Navneet Singh <[email protected]>

Author: navneet35

specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/bigDataPool.json

@@ -442,6 +442,13 @@
           "$ref": "#/definitions/LibraryRequirements",
           "description": "Library version requirements"
         },
+        "customLibraries": {
+          "description": "List of custom libraries/packages associated with the spark pool.",
+          "type": "array",
+          "items": {
+            "$ref": "../../../../data-plane/Microsoft.Synapse/preview/2019-06-01-preview/library.json#/definitions/LibraryResourceProperties"
+          }
+        },
         "sparkConfigProperties": {
           "$ref": "#/definitions/LibraryRequirements",
           "description": "Spark configuration file to specify additional properties"