Fix RequestBuilderBase compatibility

5351b5c was wrong

Author: slandelle

client/src/main/java/org/asynchttpclient/RequestBuilderBase.java

@@ -183,8 +183,8 @@ public T clearHeaders() {
     /**
      * @see #setHeader(CharSequence, Object)
      */
-    public T setHeader(String name, Object value) {
-        return setHeader((CharSequence) name, value);
+    public T setHeader(CharSequence name, String value) {
+        return setHeader(name, (Object) value);
     }
 
     /**
@@ -199,13 +199,6 @@ public T setHeader(CharSequence name, Object value) {
         return asDerivedType();
     }
 
-    /**
-     * @see #setHeader(CharSequence, Iterable)
-     */
-    public T setHeader(String name, Iterable<?> values) {
-        return setHeader((CharSequence) name, values);
-    }
-    
     /**
      * Set multi-values header for the request
      *
@@ -221,8 +214,8 @@ public T setHeader(CharSequence name, Iterable<?> values) {
     /**
      * @see #addHeader(CharSequence, Object)
      */
-    public T addHeader(String name, Object value) {
-        return addHeader((CharSequence) name, value);
+    public T addHeader(CharSequence name, String value) {
+        return addHeader(name, (Object) value);
     }
 
     /**
@@ -243,13 +236,6 @@ public T addHeader(CharSequence name, Object value) {
         return asDerivedType();
     }
 
-    /**
-     * @see #addHeader(CharSequence, Iterable)
-     */
-    public T addHeader(String name, Iterable<?> values) {
-        return addHeader((CharSequence) name, values);
-    }
-
     /**
      * Add header values for the request. If a header with {@code name} was setup for this request already -
      * call will add more header values and convert it to multi-value header