Big refactoring in order to allow multiple TAP versions (3)

TASMAN-core/src/main/java/it/inaf/ia2/tsm/Column.java

...core/src/main/java/it/inaf/ia2/tsm/ConsistencyChecks.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/Dao.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/DaoColumn.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/DaoKey.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/DaoSchema.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/DaoTable.java

...AN-core/src/main/java/it/inaf/ia2/tsm/EntityProperty.java

...ore/src/main/java/it/inaf/ia2/tsm/InsertQueryBuilder.java

...ore/src/main/java/it/inaf/ia2/tsm/SelectQueryBuilder.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/TSMUtil.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/Table.java

TASMAN-core/src/main/java/it/inaf/ia2/tsm/TapSchema.java

...N-core/src/main/java/it/inaf/ia2/tsm/TapSchemaEntity.java

...ore/src/main/java/it/inaf/ia2/tsm/UpdateQueryBuilder.java

...ore/src/main/java/it/inaf/ia2/tsm/datalayer/DBBroker.java

.../main/java/it/inaf/ia2/tsm/datalayer/DBBrokerFactory.java

...main/java/it/inaf/ia2/tsm/datalayer/DBBrokerTemplate.java

...n/java/it/inaf/ia2/tsm/datalayer/mysql/MySQLDBBroker.java

...ava/it/inaf/ia2/tsm/datalayer/pgsql/PostgresDBBroker.java