this commit remove the code which sets the dmcrypt encryption key from secret as environment variable in the prepare pod job spec. Now, the env will be set under function `setKEKinEnv`, which tries to reads secret from k8s first method `c.IsK8s()`under `GetSecret` and then check for KMS to ready and apply env directly. Signed-off-by: subhamkrai <srai@redhat.com>