SDK-2771: [MB] Address SonarQube quality concern surrounding use of regex

Author: bucky-boy

yoti-sdk-api/src/main/java/com/yoti/api/client/spi/remote/call/YotiHttpRequestBuilder.java

@@ -107,7 +107,13 @@ public YotiHttpRequestBuilder forSignedRequest(KeyPair keyPair) {
      * @return the updated builder
      */
     public YotiHttpRequestBuilder withBaseUrl(String baseUrl) {
-        this.baseUrl = baseUrl.replaceAll("([/]+)$", "");
+        int index;
+        for (index = baseUrl.length() - 1; index >= 0; index--) {
+            if (baseUrl.charAt(index) != '/') {
+                break;
+            }
+        }
+        this.baseUrl = baseUrl.substring(0, index + 1);
         return this;
     }