Fix typo in GeoUtils#isValidLongitude (#25121)

GeoUtils#isValidLongitude is inconsistent with GeoUtils#isValidLatitude. 
Neither technically need the isInfinite() check because they then compare 
against min and max values.

Author: skeggse

core/src/main/java/org/elasticsearch/common/geo/GeoUtils.java

@@ -82,7 +82,7 @@ public static boolean isValidLatitude(double latitude) {
 
     /** Returns true if longitude is actually a valid longitude value. */
     public static boolean isValidLongitude(double longitude) {
-        if (Double.isNaN(longitude) || Double.isNaN(longitude) || longitude < GeoUtils.MIN_LON || longitude > GeoUtils.MAX_LON) {
+        if (Double.isNaN(longitude) || Double.isInfinite(longitude) || longitude < GeoUtils.MIN_LON || longitude > GeoUtils.MAX_LON) {
             return false;
         }
         return true;