Remove redundant app name from Docker redis container name

[fmhoeger]

• Remove redundant app name from Docker redis container name:
  Example:
  cap-recruiter-demographics-redis_cap-recruiter-demographics-1 when it should be
  cap-recruiter-demographics-redis-1

36845d48e688   registry.gitlab.com/computational-audition/experiment-images   "dallinger_heroku_web"   6 days ago     Up 2 days                                                                                                             cap-recruiter-demographics-web-1
a8f4c18990ef   registry.gitlab.com/computational-audition/experiment-images   "dallinger_heroku_wo…"   6 days ago     Up 2 days                                                                                                             cap-recruiter-demographics-worker_1-1
b8b12cef4526   registry.gitlab.com/computational-audition/experiment-images   "dallinger_heroku_cl…"   6 days ago     Up 2 days                                                                                                             cap-recruiter-demographics-clock-1
f6f27183a617   redis                                                          "docker-entrypoint.s…"   6 days ago     Up 2 days (healthy)     6379/tcp                                                                                      cap-recruiter-demographics-redis_cap-recruiter-demographics-1
a2b65b4449f8   bitnami/pgbouncer:1.19.1                                       "/opt/bitnami/script…"   6 days ago     Up 2 days               6432/tcp                                                                                      cap-recruiter-demographics_pgbouncer