[api] OPSAPS-32658. Add pools refresh endpoint

Nothing special. It's been MIA for a while.

>>> from cm_api.api_client import ApiResource
>>> api=ApiResource("nightly-1.gce.cloudera.com", username="admin", password="admin")
>>> cluster=api.get_cluster("Cluster 1")
>>> cmd = cluster.pools_refresh()

python/src/cm_api/endpoints/clusters.py

@@ -621,6 +621,15 @@ def export(self, export_auto_config=False):
     return self._get("export", ApiClusterTemplate, False,
                      params=dict(exportAutoConfig=export_auto_config), api_version=12)
 
+  def pools_refresh(self):
+    """
+    Refresh Dynamic Pools configurations for relevant services..
+
+    @return: Reference to the submitted command.
+    @since: API v12
+    """
+    return self._cmd('poolsRefresh')
+
   def list_dfs_services(self, view=None):
     """
     List available DFS (distributed file system) services in a cluster.

python/src/cm_api_tests/test_clusters.py

@@ -115,6 +115,15 @@ def test_export_cluster_template(self):
       retdata=ApiClusterTemplate(resource).to_json_dict())
     cluster.export(export_auto_config=True)
 
+  def test_pools_refresh(self):
+    resource = utils.MockResource(self)
+    cluster = ApiCluster(resource, name="foo")
+
+    resource.expect("POST", "/clusters/foo/commands/poolsRefresh",
+        data=None,
+        retdata={ 'name' : 'foo'})
+    cluster.pools_refresh()
+
   def test_list_dfs_services(self):
     resource = utils.MockResource(self)
     cluster = ApiCluster(resource, name="foo")