Towards release 1.0.0 (for O-RAN A)

- Implement the Release A spec in openapi.yaml
- Rework A1 to follow that spec
- Remove rmr_mapping now that we use policyid as the mtype to send and a well known mtype for the ACKs
- Add the delay receiver test to the tavern integration tests
- Remove unneeded ENV variables from helm charts
- Switch away from builder images to avoid quicksand; upgrade rmr at our own pace

Change-Id: I62de4c7b9b06fbdc309c4c07213b76400036c95e
Signed-off-by: Tommy Carpenter <tc677g@att.com>
diff --git a/tox.ini b/tox.ini
index b621d02..dc9f690 100644
--- a/tox.ini
+++ b/tox.ini
@@ -37,4 +37,4 @@
 commands = flake8 setup.py a1 tests
 
 [flake8]
-extend-ignore = E501
+extend-ignore = E501,E741