[Issue] nacos-client : ServerHttpAgent builds the unnormalized URL

[mercyblitz]

nacos-client: 1.2.1

The method ServerHttpAgent#getUrl(String,String) builds an HTTP URL when nacos-client sends a request to nacos server, however the generated URL is unnormalized if the return value of ServerListManager#getContentPath() includes mupltile slashes ("/") :

    private String getUrl(String serverAddr, String relativePath) {
        String contextPath = serverListMgr.getContentPath().startsWith("/") ?
                serverListMgr.getContentPath() : "/" + serverListMgr.getContentPath();
        return serverAddr + contextPath + relativePath;
    }

Assuming that the arguments:

• serverAddr is "http://127.0.0.1:8080"
• serverListMgr.getContentPath() is "//"
• relativePath is "/v1/cs/configs"

The above method will result in "http://127.0.0.1:8848//nacos/v1/cs/configs", it's the unnormalized URL.