Upgrade commons-collections to latest version.
Upgrade commons-collections to latest version.

Fixes security vulnerability in commons-collections.

amolenaar/fitnesse,jdufner/fitnesse,rbevers/fitnesse,hansjoachim/fitnesse,jdufner/fitnesse,amolenaar/fitnesse,rbevers/fitnesse,jdufner/fitnesse,hansjoachim/fitnesse,rbevers/fitnesse,hansjoachim/fitnesse,amolenaar/fitnesse