fix: allow to redirect on initialUri when using SAML - EXO-66292 - Me…

…eds-io/meeds#1104

Before this fix, with SAML, user is not redirected on initialUri if he is not connected to IDP after successul authentication
This modification ensure to add the initialURI parameter in the next request after the /sso request

agent/src/main/java/org/gatein/sso/agent/filter/LoginRedirectFilter.java

@@ -70,7 +70,11 @@ public void doFilter(ServletRequest request, ServletResponse response,
     */
    protected String getLoginRedirectURL(HttpServletRequest httpRequest)
    {
-      return this.loginUrl;
+		 String url = this.loginUrl;
+		 if (httpRequest.getQueryString() != null) {
+			 url = url + "?" + httpRequest.getQueryString();
+		 }
+		 return url;
    }
 
 }