update httpclient to 2.4.0

Change-Id: Iecc020970bc9aaf4b26308100135be04199a57f0
release: version 0.5.5

Change-Id: Idac60bc1b25a36dc616b02df14b96319c0f1c041
Merge branch 'release_0_5_5'

bump version of httpclient and released a new version

Change-Id: Ie0af90411b2490611ce3c385bee8e3bb2b2545f5