[SYSTEMML-1992] Implemenation of Mode finding for Gaussian Process
[SYSTEMML-1992] Implemenation of Mode finding for Gaussian Process

Closes #711.

gweidner/incubator-systemml,dusenberrymw/systemml,dusenberrymw/incubator-systemml,dusenberrymw/systemml,nakul02/incubator-systemml,dusenberrymw/incubator-systemml,apache/incubator-systemml,apache/incubator-systemml,deroneriksson/incubator-systemml,gweidner/incubator-systemml,dusenberrymw/incubator-systemml,gweidner/incubator-systemml,deroneriksson/incubator-systemml,gweidner/incubator-systemml,dusenberrymw/systemml,deroneriksson/systemml,dusenberrymw/incubator-systemml,apache/incubator-systemml,dusenberrymw/systemml,gweidner/systemml,deroneriksson/systemml,deroneriksson/systemml,nakul02/systemml,apache/incubator-systemml,apache/incubator-systemml,gweidner/incubator-systemml,deroneriksson/systemml,dusenberrymw/systemml,niketanpansare/systemml,nakul02/systemml,nakul02/incubator-systemml,deroneriksson/incubator-systemml,gweidner/systemml,nakul02/incubator-systemml,dusenberrymw/incubator-systemml,deroneriksson/incubator-systemml,nakul02/incubator-systemml,nakul02/systemml,gweidner/systemml,gweidner/systemml,nakul02/systemml,deroneriksson/incubator-systemml,niketanpansare/systemml,nakul02/systemml,niketanpansare/systemml,gweidner/incubator-systemml,dusenberrymw/systemml,dusenberrymw/incubator-systemml,niketanpansare/incubator-systemml,niketanpansare/systemml,apache/incubator-systemml,niketanpansare/incubator-systemml,niketanpansare/systemml,niketanpansare/incubator-systemml,niketanpansare/systemml,deroneriksson/systemml,gweidner/systemml,niketanpansare/incubator-systemml,deroneriksson/systemml,nakul02/incubator-systemml,gweidner/systemml,nakul02/systemml,nakul02/incubator-systemml,deroneriksson/incubator-systemml