Do not pull docker image in pipeline when PULL_DOCKER_IMAGE env var is false
Do not pull docker image in pipeline when PULL_DOCKER_IMAGE env var is false

Signed-off-by: Chelsea Troy <5ebeaa75590f25092c9987f54a631e9be80efc53@pivotal.io>

svrc-pivotal/lattice,svrc-pivotal/lattice,SrinivasChilveri/lattice,datachand/lattice,datachand/lattice,Klaudit/lattice,Klaudit/lattice,mikegehard/lattice,SrinivasChilveri/lattice,cloudfoundry-incubator/ltc,SrinivasChilveri/lattice,svrc-pivotal/lattice,datachand/lattice,mikegehard/lattice,davidwadden/lattice-release,Klaudit/lattice,SrinivasChilveri/lattice,davidwadden/lattice,cloudfoundry-incubator/ltc,felipeg48/lattice,svrc-pivotal/lattice,Klaudit/lattice,davidwadden/lattice,datachand/lattice,davidwadden/lattice-release,felipeg48/lattice