run graphql tests only when AG version >= 7.3.0
run graphql tests only when AG version >= 7.3.0

Change-Id: I6b1275b247a0635b455f616809b74dc002967463
Reviewed-on: https://gerrit.franz.com:9080/c/agraph-python/+/20661
Reviewed-by: Tianyu Gu <09f9fbda6847fe3fc9ff5ae97d6609017cc888d0@franz.com>
Reviewed-by: John Foderaro <36bcc8333a6247b9ed9654f0e2527ee081e8f082@franz.com>
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@franz.com>
PTEST: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@franz.com>

franzinc/agraph-python,franzinc/agraph-python,franzinc/agraph-python,franzinc/agraph-python