shexapod-add-lock-to-support-concurrent-reads-of-state-and-position

Merge branch '3366-shexapod-add-lock-to-support-concurrent-reads-of-state-and-position' into 'master'

Resolve "shexapod: add lock to support concurrent reads of state and position"

Closes #3366 (closed)

See merge request !4652 (merged)

(cherry picked from commit d20bba1f)

427f19c3 shexapod: add lock to support concurrent reads of state and position