enable_server swift3 fails test for legacy swift service

[Alun Champion]

Enabling swift3 causes the check for legacy swift service name to trip up:
    FATAL: 'swift' is not supported as a service name
    FATAL: Use the actual swift service names to enable tham as required:
    FATAL: s-proxy s-object s-container s-account

Offending line:
153 if [[ ,${ENABLED_SERVICES} =~ ,"swift" ]]; then

Presumably just needs to be changed to:
153 if [[ ,${ENABLED_SERVICES}, =~ ,"swift", ]]; then

[Sean Dague (sdague)]

This devstack bug was last updated over 180 days ago, as devstack
is a fast moving project and we'd like to get the tracker down to
currently actionable bugs, this is getting marked as Invalid. If the
issue still exists, please feel free to reopen it.