BUG 2788838: change external variable declaration to "as document-node()" for ST-Axes test cases that expect XPST0005.
BUG 2788838: change external variable declaration to "as document-node()" for
ST-Axes test cases that expect XPST0005.

28msec/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba