Merge pull request #187 from mulesoft/FlakyAsyncExceptionHandlingTestCase

Flaky async exception handling test case(cherry picked from commit 71116ccd0c1709fb11771577c0d162826f1c71ee)
(cherry picked from commit 0dbaf0d0c4471074af482b11077197f1ccc0ec88)
(cherry picked from commit b0ab2a1df67f292b3b3805e6f3ad5f3c9e68b0ff)