IVR: HTTP request parameters bug fix

Mistakenly using HttpMessage.setParams to set the query parameters.
Now using URIBuilder.setParameter (for GET) and
setEntity(UrlEncodedFormEntity) (for POST)

Change-Id: I07519b1047a427c2e00246bbad9c4333baf7a434
Merge "IVR: HTTP request parameters bug fix"