1. add timing info attribute for activityLogEntry
2. for older logs, no timing info will be shown
3. for new logs, timing info will be shown in format:   m:s:ms
4.only successful request will be timed now
1. add text colour for differentiation purpose
2. simplify time format
1. change processTime to timeTaken
2. add parameter to getColorCode function for easy testing
Merge branch 'master' into Issue1369
[1369] adminActivityLog: show timing info

fixes #1369