fix: make removeScheme case insensitive (#1423)

Author: kolea2

google-cloud-datastore/src/main/java/com/google/cloud/datastore/DatastoreUtils.java

@@ -45,6 +45,7 @@ public static boolean isLocalHost(String host) {
 
   public static String removeScheme(String url) {
     if (url != null) {
+      url = url.toLowerCase();
       if (url.startsWith("https://")) {
         return url.substring("https://".length());
       } else if (url.startsWith("http://")) {

google-cloud-datastore/src/test/java/com/google/cloud/datastore/DatastoreUtilsTest.java

@@ -38,5 +38,6 @@ public void testRemoveScheme() {
     assertThat(removeScheme("http://localhost:9090")).isEqualTo("localhost:9090");
     assertThat(removeScheme("https://localhost:9090")).isEqualTo("localhost:9090");
     assertThat(removeScheme("https://localhost:9090")).isEqualTo("localhost:9090");
+    assertThat(removeScheme("Https://localhost:9090")).isEqualTo("localhost:9090");
   }
 }