Merge pull request #7389 from ryanpetrello/tmux-dev

move tmux to dev dependencies

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

installer/roles/image_build/templates/Dockerfile.j2

@@ -106,6 +106,7 @@ RUN dnf -y install \
     nss \
     make \
     patch \
+    tmux \
     wget \
     diffutils \
     unzip && \
@@ -136,7 +137,6 @@ RUN dnf -y update && \
     rsync \
     subversion \
     sudo \
-    tmux \
     vim-minimal \
     which \
     xmlsec1-openssl && \