Bug: only show clusters created with aztk in list (#200)

* only show clusters created with aztk in list

* check the full metadata key value pair and cleanup code

aztk_sdk/client.py

@@ -116,13 +116,18 @@ class Client:
         nodes = self.batch_client.compute_node.list(pool_id=cluster_id)
         return pool, nodes
 
-    def __list_clusters(self):
+    def __list_clusters(self, software_metadata_key):
         """
             List all the cluster on your account.
         """
         pools = self.batch_client.pool.list()
-
-        return [pool for pool in pools]
+        software_metadata = (constants.AZTK_SOFTWARE_METADATA_KEY, software_metadata_key)
+        
+        aztk_pools = []
+        for pool in [pool for pool in pools if pool.metadata]:
+            if software_metadata in [(metadata.name, metadata.value) for metadata in pool.metadata]:
+                aztk_pools.append(pool)
+        return aztk_pools
     
     def __create_user(self, pool_id: str, node_id: str, username: str, password: str = None, ssh_key: str = None) -> str:
         """

aztk_sdk/spark/client.py

@@ -1,5 +1,6 @@
 from typing import List
 import azure.batch.models.batch_error as batch_error
+import aztk_sdk
 from aztk_sdk import error
 from aztk_sdk.client import Client as BaseClient
 from aztk_sdk.spark import models
@@ -61,7 +62,7 @@ class Client(BaseClient):
     
     def list_clusters(self):
         try:
-            return [models.Cluster(pool) for pool in self.__list_clusters()]
+            return [models.Cluster(pool) for pool in self.__list_clusters(aztk_sdk.models.Software.spark)]
         except batch_error.BatchErrorException as e:
             raise error.AztkError(helpers.format_batch_exception(e))