(moveit_config) Default speed needs to be moderately slow.

[Values currently set are very fast](https://github.com/tork-a/rtmros_nextage/commit/bbf7d31e285223ac216f5d11da8ca4249947ebaa#diff-ff83b48fa6274dda265e036bf5a75a9e) because of a special request at the time of an event. This PReq reverts it back to moderate speed.