Update pom.xml

1. Updated compatible Jenkins version to v1.447 (almost an year old)
2. Removed unnecessary sections from pom
3. Added encoding information
Fixed: JENKINS-15119 - Duration sorting is incorrect in TestNG report

1. Sorting in Jenkins table is alphabetic and that was a problem for how we were formatting duration string. Also, our duration strings were difficult to read. Changed it to be:
a. "> 24hrs", or
b. hh:mm:ss.ZZZ

This takes care of sorting as well as makes reading/comparing the time duration easier across multiple rows. Added FormatUtilTest as well.