move schema changes to 4.22 path

Author: Pearl1594

engine/schema/src/main/java/com/cloud/upgrade/DatabaseUpgradeChecker.java

@@ -33,7 +33,6 @@
 
 import javax.inject.Inject;
 
-import com.cloud.upgrade.dao.Upgrade42010to42020;
 import com.cloud.utils.FileUtil;
 import org.apache.cloudstack.utils.CloudStackVersion;
 import org.apache.commons.lang3.StringUtils;

engine/schema/src/main/java/com/cloud/upgrade/dao/Upgrade42010to42020.java

@@ -21,3 +21,6 @@
 
 -- Increase length of scripts_version column to 128 due to md5sum to sha512sum change
 CALL `cloud`.`IDEMPOTENT_CHANGE_COLUMN`('cloud.domain_router', 'scripts_version', 'scripts_version', 'VARCHAR(128)');
+
+CALL `cloud`.`IDEMPOTENT_DROP_UNIQUE_KEY`('counter', 'uc_counter__provider__source__value');
+CALL `cloud`.`IDEMPOTENT_ADD_UNIQUE_KEY`('cloud.counter', 'uc_counter__provider__source__value__removed', '(provider, source, value, removed)');