[CONJ-906] possible Deadlock in AwsIamCredentialPlugin

nonMappedOptions properties internally use a ConcurrentHashap with lots of locking. This must not be checked for equality, possibly resulting in dead lock (and since non used option, it doesn't even make sense to test equality on it)

src/main/java/org/mariadb/jdbc/util/Options.java

@@ -446,9 +446,6 @@ public boolean equals(Object obj) {
     if (!Objects.equals(credentialType, opt.credentialType)) {
       return false;
     }
-    if (!Objects.equals(nonMappedOptions, opt.nonMappedOptions)) {
-      return false;
-    }
     if (!Objects.equals(tlsSocketType, opt.tlsSocketType)) {
       return false;
     }