debuginfod: reduce verbosity, improve debuggability

Have Dockerfile add a few rpms needed for "oc rsync" and "oc rsh" diagnostics.
Reduce default verbosity to -vv to avoid flooding logs with traversal msgs.
Reduce scanner concurrency to 3, considering limited cpu resources on .stg.

roles/openshift-apps/debuginfod/files/buildconfig.yml

@@ -17,7 +17,7 @@ items:
           vendor="Fedora Infrastructure"
         WORKDIR /
         EXPOSE 8002
-        RUN dnf -y install bsdtar elfutils-debuginfod && \
+        RUN dnf -y install bsdtar elfutils-debuginfod sqlite3 procps-ng rsync tar && \
             dnf autoremove -y
       type: Dockerfile
     strategy:

roles/openshift-apps/debuginfod/templates/deploymentconfig.yml

@@ -25,9 +25,9 @@ spec:
       - name: debuginfod
         image: debuginfod:latest
         command: ["/usr/bin/debuginfod",
-                  "-vvv",
+                  "-vv",
                   "-d", "/var/cache/debuginfod/db.sqlite",
-                  "-c", "8",
+                  "-c", "3",
                   "-t", "3600",
                   "-g", "604800",
                   # exclude signed etc. variants, just want original RPMs