SQLA 2.0 - Fix connection.execute

execute() in SQL Alchemy 2.x has different behaviour,
this patch adapts alembic scripts.
See [1].

[1]: https://docs.sqlalchemy.org/en/20/changelog/migration_20.html#execute-method-more-strict-execution-options-are-more-prominent

Change-Id: I597eed6f24f13f96f78f6596e16b6edcff989a90

Author: mnasiadka

magnum/db/sqlalchemy/alembic/versions/461d798132c7_change_cluster_to_support_nodegroups.py

@@ -65,7 +65,7 @@ def upgrade():
 
     connection = op.get_bind()
     # Fetching all required info from existing cluster
-    res = connection.execute(
+    res = connection.execute(sa.text(
         "SELECT "
         "cluster.uuid, "
         "cluster.name, "
@@ -82,7 +82,7 @@ def upgrade():
         "cluster_template.flavor_id, "
         "cluster_template.image_id "
         "FROM cluster INNER JOIN cluster_template "
-        "ON cluster.cluster_template_id=cluster_template.uuid"
+        "ON cluster.cluster_template_id=cluster_template.uuid")
     )
 
     results = res.fetchall()

magnum/db/sqlalchemy/alembic/versions/95096e2334ee_add_master_lb_enabled_to_cluster.py

@@ -33,11 +33,11 @@ def upgrade():
                             default=False))
     # Populate existing cluster with the cluster template_id
     connection = op.get_bind()
-    connection.execute(
+    connection.execute(sa.text(
         "UPDATE cluster "
         "INNER JOIN cluster_template "
         "ON cluster_template.uuid=cluster.cluster_template_id "
         "SET cluster.master_lb_enabled=cluster_template.master_lb_enabled "
         "WHERE cluster_template.uuid=cluster.cluster_template_id and "
-        "cluster.master_lb_enabled is NULL"
+        "cluster.master_lb_enabled is NULL")
     )

magnum/db/sqlalchemy/alembic/versions/c04e925e65c2_nodegroups_v2.py

@@ -41,10 +41,10 @@ def upgrade():
     # Populate existing nodegroups with the cluster stack_id
     connection = op.get_bind()
 
-    connection.execute(
+    connection.execute(sa.text(
         "UPDATE nodegroup "
         "INNER JOIN cluster ON nodegroup.cluster_id=cluster.uuid "
         "SET nodegroup.stack_id=cluster.stack_id, "
         "nodegroup.status=cluster.status, nodegroup.version=0 "
-        "WHERE nodegroup.cluster_id=cluster.uuid"
+        "WHERE nodegroup.cluster_id=cluster.uuid")
     )