Let's use Pyro4 >= 4.39 (has built-in MAX_RETRIES)
Let's use Pyro4 >= 4.39 (has built-in MAX_RETRIES)

Signed-off-by: Rodrigo Tobar <bd955c861cbec2e41c0959cf13c7f573fa307e58@icrar.org>

steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge