uniemimu: add strategy defaults and fix nodeFit for node affinity strategy

JobBuild
793
05-12 18:54
pull-descheduler-helm-test 1541814930288676864
pull-descheduler-test-e2e-k8s-master-1-22 1541814930234150912
pull-descheduler-test-e2e-k8s-master-1-23 1541814930188013568
pull-descheduler-test-e2e-k8s-master-1-24 1541814930154459136 1524825337857314816
pull-descheduler-unit-test-master-master 1541814930112516096
pull-descheduler-verify-build-master 1541814930078961664
pull-descheduler-verify-master 1541814930041212928