Feature/#323 notification handler for reject timeout

[shashi165]

Story 323 : Implement Notification Handler for Rejections & time-outs in ml-api-adapter

1. added the logic to send callback notification for reject/abort and timeouts
2. fixed the integration tests

Unit Tests

1..120
# tests 120
# pass  120

# ok

Coverage Tests

=============================== Coverage summary ===============================
Statements   : 100% ( 357/357 )
Branches     : 100% ( 92/92 )
Functions    : 100% ( 38/38 )
Lines        : 100% ( 357/357 )
================================================================================

1..120
# tests 120
# pass  120

# ok

Integration Tests

  <testsuite tests="0" failures="0" errors="0" name="setup"/>
  <testsuite tests="0" failures="0" errors="0" name="transfer service"/>
  <testsuite tests="0" failures="0" errors="0" name="prepare should"/>
  <testsuite tests="2" failures="0" errors="0" name="produce a transfer message to kafka">
  <testsuite tests="0" failures="0" errors="0" name="Notification Handler"/>
  <testsuite tests="1" failures="0" errors="0" name="setup connect to kafka">
  <testsuite tests="0" failures="0" errors="0" name="setup disconnect from kafka"/>
  <testsuite tests="0" failures="0" errors="0" name="Notification Handler should"/>
  <testsuite tests="1" failures="0" errors="0" name="Notification Handler should consume a PREPARE message and send POST callback">
  <testsuite tests="1" failures="0" errors="0" name="Notification Handler should consume a PREPARE message and send PUT callback on error">
  <testsuite tests="2" failures="0" errors="0" name="Notification Handler should consume a COMMIT message and send PUT callback">
  <testsuite tests="1" failures="0" errors="0" name="Notification Handler should consume a COMMIT message and send PUT callback on error">
  <testsuite tests="2" failures="0" errors="0" name="Notification Handler should consume a REJECT message and send PUT callback">
  <testsuite tests="2" failures="0" errors="0" name="Notification Handler should consume a ABORT message and send PUT callback">
  <testsuite tests="1" failures="0" errors="0" name="Notification Handler should consume a TIMEOUT-RECEIVED message and send PUT callback">
  <testsuite tests="0" failures="0" errors="0" name="Notification Handler should tear down"/>

[mdebarros]

+1