first crack at adding ssh host key display to the capsul detail page

capsulflask/schema_migrations/12_down_ssh_host_keys.sql

@@ -0,0 +1,7 @@
+
+
+DROP TABLE vm_ssh_host_key;
+
+ALTER TABLE vm_ssh_authorized_key RENAME TO vm_ssh_public_key;
+
+UPDATE schemaversion SET version = 11;