Consistency checking improvements

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

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

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

...main/java/it/inaf/ia2/tsm/InconsistentColumnProperty.java

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

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

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

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

...ore/src/main/resources/schema_definition/tap_schema-1.xml

TASMAN-core/src/test/java/it/inaf/ia2/tsm/TestAll.java

...in/java/it/inaf/ia2/tsm/webapp/ConsistencyChecksBean.java

...src/main/java/it/inaf/ia2/tsm/webapp/TapSchemaLoader.java

TASMAN-webapp/src/main/webapp/consistencyChecks.xhtml