Dynamic VDB export and import set bigdecimal precision to 20 if not defined and should be 0

Import vdb-xml into Teiid vdb: attribute with bigdecimal type (without precision) gets converted into bigdecimal(20) type (with precision=20), expected bigdecimal type

and

Export teiid-vdb to vdb-xml: attribute with bigdecimal type (without precision) gets converted into bigdecimal(20) type (with precision=20), expected bigdecimal type

If no precision is specified default to 0.