added null check in HttpUtil for acceptType in send Get request
added null check in HttpUtil for acceptType in send Get request

sylvanmist/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,sylvanmist/Web-Karma,usc-isi-i2/Web-Karma,sylvanmist/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,sylvanmist/Web-Karma,sylvanmist/Web-Karma,rpiotti/Web-Karma