Add server schema for microversion 2.57

This commit adds servers schema for microversion 2.57
Without those schema in this file, get_schema() method
will throw error about particular schema not found in this file.

Change-Id: Ib5a9886bff2f0c7d8ba5be413703cf2eb39fc9d1
partially-implements: blueprint full-schema-for-all-microversions
1 file changed