writerfilter: remove last NS_rtf usage in ooxml

Change-Id: I79e0fa9d0ee35e31912d36ec213acf1a83b3547e
writerfilter: remove METAFILEPICT class in doctok

Change-Id: Icb124a2f7445ca17f04dc0024dc17cbcc4b0ca6d
writerfilter: unused List class in doctok

Change-Id: I2e3315584e66b7a99003512b197062807674f8aa
writerfilter: refactor to remove redundant ListLevel class in doctok

Change-Id: I762e4f09b55d957bdd57e76651417bed11cb1e74
sw: add testcase for RTF_LEVELFOLLOW import

I almost broke this during refactoring...

Change-Id: If38e73f3b7d66e97bbcbad87447b8aa611ff79d1
writerfilter: whitespace fixes in SdtHelper

Change-Id: Idcb74c5e911ec2337f1e8743dc4627464f1cfd27
writerfilter: drop no longer needed LFO/LFOLevel classes in doctok

Change-Id: I594d854db54a74ddf3f32d4b30b1c4f1aa38d431