Temporary reduce code coverage to 90 percent

Coverage failures may hide other failing tests in the CI.
Configure coverage to fail under 90 percent during the
ongoing experimental-client development.

Signed-off-by: Teodora Sechkova <[email protected]>

Author: sechkova

tox.ini

@@ -16,7 +16,7 @@ changedir = tests
 commands =
     python --version
     coverage run aggregate_tests.py
-    coverage report -m --fail-under 97
+    coverage report -m --fail-under 90
 
 deps =
     -r{toxinidir}/requirements-test.txt