Use HTTP Method references vs raw string.

Author: rlubke

providers/grizzly/src/main/java/org/asynchttpclient/providers/grizzly/EventHandler.java

@@ -36,6 +36,7 @@
 import org.glassfish.grizzly.http.HttpContent;
 import org.glassfish.grizzly.http.HttpHeader;
 import org.glassfish.grizzly.http.HttpResponsePacket;
+import org.glassfish.grizzly.http.Method;
 import org.glassfish.grizzly.http.ProcessingState;
 import org.glassfish.grizzly.http.Protocol;
 import org.glassfish.grizzly.http.util.Header;
@@ -471,7 +472,7 @@ public static Request newRequest(final URI uri,
 
         final RequestBuilder builder = new RequestBuilder(ctx.getRequest());
         if (asGet) {
-            builder.setMethod("GET");
+            builder.setMethod(Method.GET.getMethodString());
         }
         builder.setUrl(uri.toString());
 

providers/grizzly/src/main/java/org/asynchttpclient/providers/grizzly/statushandler/ProxyAuthorizationHandler.java

@@ -25,6 +25,7 @@
 import org.glassfish.grizzly.filterchain.FilterChainContext;
 import org.glassfish.grizzly.http.HttpContext;
 import org.glassfish.grizzly.http.HttpResponsePacket;
+import org.glassfish.grizzly.http.Method;
 import org.glassfish.grizzly.http.util.Header;
 import org.glassfish.grizzly.http.util.HttpStatus;
 import org.ietf.jgss.GSSContext;
@@ -74,7 +75,7 @@ public boolean handleStatus(final HttpResponsePacket responsePacket,
         Realm realm = new Realm.RealmBuilder().setPrincipal(principal)
                 .setPassword(password)
                 .setUri("/")
-                .setMethodName("CONNECT")
+                .setMethodName(Method.CONNECT.getMethodString())
                 .setUsePreemptiveAuth(true)
                 .parseProxyAuthenticateHeader(proxyAuth)
                 .build();