fix OOXML validation issue, related fdo#33951

Change-Id: I6e455ee4bb649a299023f1dba88a01ef5674e074
make sure the two namespace lists are sorted the same way

Change-Id: I90b3182e10dbbfc8993010dd885509537d2fe537
handle OOXML strict namespaces

Change-Id: I198862388426161e3f054a5f128639c59f3c9d24
support OOXML strict documents in Calc

Change-Id: I277d76aeec28e173d913ccc1506464afe4d09c6d
remove empty lines after comment removal

Change-Id: Iad5cb7303f3797c06a53651b0f0c7e7c2273ef55