add a retry for couchbase connection

[randytpierce]

this is pretty easy so going ahead and merging

[github-actions]

Package	Line Rate	Branch Rate	Health
vxingest	33%	42%	❌
vxingest.builder_common	28%	16%	❌
vxingest.ctc_to_cb	12%	1%	❌
vxingest.grib2_to_cb	12%	1%	❌
vxingest.netcdf_to_cb	13%	1%	❌
vxingest.partial_sums_to_cb	12%	1%	❌
vxingest.utilities	30%	32%	❌
Summary	16% (488 / 3024)	6% (40 / 704)	❌