PyMySQL 0.8.0 compat fix

In PyMySQL the "MULTI_STATEMENT" flag has been disabled
by default. (see PyMySQL/PyMySQL#590 )

Migration 98 had a single string with multiple statements
ran in a single execution.

Moving this to multiple executions of the same statements
allows the migration to succeed with the new behaviour.

Caused-By: PyMySQL/PyMySQL@c0aa317

Change-Id: I5f6d92f695c4c5830b8595b0cecbbafb426470a1

designate/storage/impl_sqlalchemy/migrate_repo/versions/098_fix_service_charset.py

@@ -25,9 +25,10 @@ def upgrade(migrate_engine):
     if migrate_engine.name != "mysql":
         return
 
-    sql = """SET foreign_key_checks = 0;
-    ALTER TABLE service_statuses CONVERT TO CHARACTER SET utf8;
-    SET foreign_key_checks = 1;
-    ALTER DATABASE %s DEFAULT CHARACTER SET utf8;
-    """ % migrate_engine.url.database
-    migrate_engine.execute(sql)
+    migrate_engine.execute("SET foreign_key_checks = 0;")
+    migrate_engine.execute(
+        "ALTER TABLE service_statuses CONVERT TO CHARACTER SET utf8;")
+    migrate_engine.execute("SET foreign_key_checks = 1;")
+    migrate_engine.execute(
+        "ALTER DATABASE %s DEFAULT CHARACTER SET utf8;"
+        % migrate_engine.url.database)