axis2:ServiceClient增加GZIP压缩支持

                Options options = serviceClient.getOptions();
                options.setProperty(HTTPConstants.CACHED_HTTP_CLIENT, httpClient);
                options.setProperty(HTTPConstants.REUSE_HTTP_CLIENT, "true");
                options.setProperty(HTTPConstants.CHUNKED, "true");
                // Request(请求)数据用GZIP压缩
                options.setProperty(HTTPConstants.MC_GZIP_REQUEST, Boolean.TRUE);
                // 向服务器声明接受GZIP压缩
                options.setProperty(HTTPConstants.MC_ACCEPT_GZIP , Boolean.TRUE);

    /**
     * If you want the HTTP sender to indicate that it can accept a gziped
     * response, set this message context property to true. The sender will
     * automatically unzip the response if its gzipped.
     */
    public static final String MC_ACCEPT_GZIP = "transport.http.acceptGzip";

    /**
     * by default the HTTP request body is not compressed. set this message
     * context property to true to have the request body gzip compressed.
     */
    public static final String MC_GZIP_REQUEST = "transport.http.gzipRequest";

org.apache.axis2.transport.http.HTTPConstants.MC_GZIP_REQUEST
If set this will GZip your request and send over to the destination. Before doing this, you must make sure that the receiving end supports GZip compressed streams. 

Possible values are:

"true"/"false" or Boolean.TRUE/Boolean.FALSE

org.apache.axis2.transport.http.HTTPConstants.MC_ACCEPT_GZIP
Whether or not you send a gzip-ped request, you can choose to receive GZIP back from the server using this flag.

Possible values are:

"true"/"false" or Boolean.TRUE/Boolean.FALSE