NUTCH-1888 Specify HTMLMapper to use in TikaParser (Halil Simsek via jnioche)

git-svn-id: https://svn.apache.org/repos/asf/nutch/branches/2.x@1645697 13f79535-47bb-0310-9956-ffa450edef68
NUTCH-1797 remove unused package o.a.n.html

git-svn-id: https://svn.apache.org/repos/asf/nutch/branches/2.x@1646073 13f79535-47bb-0310-9956-ffa450edef68