Dockerfile: Add auto yes option for `apt-get update` even though it appears to be unnecessary.
Dockerfile: Add auto yes option for `apt-get update` even though it appears to be unnecessary.

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