xueweiz: Make all existing exporters into plugins

JobBuild
347
11-05 23:48
ci-npd-e2e-test 1204905762694893576
pull-npd-build 1191865576364969984 1191864947240341505
pull-npd-e2e-kubernetes-gce-gci 1191865576373358592 1191864947252924417
pull-npd-e2e-kubernetes-gce-gci-custom-flags 1191865576369164288 1191864947252924416
pull-npd-e2e-kubernetes-gce-ubuntu 1191865576364969985 1191864947240341504
pull-npd-e2e-kubernetes-gce-ubuntu-custom-flags 1191865576364969986 1191864947248730114
pull-npd-e2e-node 1191865576369164289 1191864947252924418
pull-npd-e2e-test 1214313238955560960
pull-npd-test 1191865576369164290 1191864947236147200