DDSXTY13 — Correct XSD issues identified during AB review

The AB review identified two critical issues with the XSD changes made by various issue resolutions that need to be fixed:

• The resolution of DDSXTY13-1 modified the definition of xs:group moduleElements and changed the name of the first element from "include2" to "include" this causes the XSD to be invalid because it conflicts with the name of another element in the definition of xs:complexType moduleDecl
  . This change should be reverted.

• The resolution of DDSXTY13-4 updated the file "DDS XTypes 1.3 XML Type Representation, No Namespace, Schema file" removing default values for attributes. However it failed to update the contents of Annex A with contain the same XSD definitions.

• The attribute value minOccurs="1" is unnecessary for element declarations because it matches the default value when the attribute is not specified. It should be removed from Annex A and the file "DDS XTypes 1.3 XML Type Representation, No Namespace, Schema file"

Update Annex A and the "XML Type Representation, No Namespace, Schema file"

Apply the corrections indicated in the issue description.