Dockerfile: Set `SGE_CONFIG_DIR` as part of the environment.
Dockerfile: Set `SGE_CONFIG_DIR` as part of the environment.

jakirkham/docker_basic,DudLab/docker_centos_drmaa_conda,nanshe-org/docker_centos_drmaa_conda,jakirkham/docker_ubuntu_drmaa_conda,jakirkham/docker_centos_drmaa_conda