sync unchanged doc plugins with 2.2.0 release
sync unchanged doc plugins with 2.2.0 release

rrimmana/birt-1,Charling-Huang/birt,sguan-actuate/birt,Charling-Huang/birt,rrimmana/birt-1,Charling-Huang/birt,sguan-actuate/birt,sguan-actuate/birt,Charling-Huang/birt,sguan-actuate/birt,Charling-Huang/birt,rrimmana/birt-1,rrimmana/birt-1,sguan-actuate/birt,rrimmana/birt-1