Started implementation of obscore creation

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

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

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

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

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

...re/src/main/java/it/inaf/ia2/tsm/model/PropertyModel.java

...core/src/main/java/it/inaf/ia2/tsm/model/SchemaModel.java

...ore/src/main/java/it/inaf/ia2/tsm/model/SchemaModels.java

...e/src/main/java/it/inaf/ia2/tsm/model/SchemaXMLModel.java

...-core/src/main/java/it/inaf/ia2/tsm/model/TableModel.java

...re/src/main/java/it/inaf/ia2/tsm/model/TableXMLModel.java

...core/src/main/java/it/inaf/ia2/tsm/model/TypeMapping.java

...ore/src/main/java/it/inaf/ia2/tsm/model/TypesMapping.java

TASMAN-core/src/main/resources/core.properties

...AN-core/src/main/resources/schema_definition/ivoa-1_1.xml

...src/main/resources/schema_definition/tap_schema-1-IA2.xml