[ADH-3676] Metastore storage refactoring #1
Merged
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*Daopackage classes. Extracted interfaces and inherited existing implementation.MetaStoreUtils.initializeDataBaseto Liquibase migrations. To enable the old MySQL logic (version < 5.7) user should set the optionsmart.metastore.migration.liquibase.labelsto valueold_mysqlin${SSM_dist}/conf/smart-site.xml