MONDRIAN-1345.  Eliminated use of deprecated commons-math DistributionFactory class.  Tested against commons-math 1.1, 2.1 and 2.2 without issue.
MONDRIAN-1345.  Eliminated use of deprecated commons-math DistributionFactory class.  Tested against commons-math 1.1, 2.1 and 2.2 without issue.

citycloud-bigdata/mondrian,citycloud-bigdata/mondrian,citycloud-bigdata/mondrian