Fix string comparison in TypeUtils.

Original Pull Request #3177
Closes #3176
Signed-off-by: Peter-Josef Meisch <pj.meisch@sothawo.com>
(cherry picked from commit 0e1a97a)

Author: sothawo

src/main/java/org/springframework/data/elasticsearch/client/elc/TypeUtils.java

@@ -436,7 +436,7 @@ static Integer waitForActiveShardsCount(@Nullable String value) {
 		// values taken from the RHLC implementation
 		if (value == null) {
 			return -2;
-		} else if ("all".equals(value.toUpperCase())) {
+		} else if ("all".equals(value.toLowerCase())) {
 			return -1;
 		} else {
 			try {