Added test to cover header drops with 100-continue
Added test to cover header drops with 100-continue

ansman/okhttp,ze-pequeno/okhttp,ansman/okhttp,ze-pequeno/okhttp,cmzy/okhttp,cketti/okhttp,square/okhttp,cketti/okhttp,tiarebalbi/okhttp,cmzy/okhttp,cketti/okhttp,ansman/okhttp,tiarebalbi/okhttp,ze-pequeno/okhttp,square/okhttp,yschimke/okhttp,square/okhttp,tiarebalbi/okhttp,yschimke/okhttp,yschimke/okhttp