Fix[rmqamqpt_basicproperties.cpp]: invert condition for userId check (#75)

Signed-off-by: Evgenii Malygin <emalygin@bloomberg.net>
Co-authored-by: Will <2185386+willhoy@users.noreply.github.com>

Author: 678098

src/rmq/rmqamqpt/rmqamqpt_basicproperties.cpp

@@ -343,7 +343,7 @@ bool BasicProperties::decode(BasicProperties* props,
     }
     if (flags & maskForProperty(USER_ID)) {
         properties.userId = "";
-        if (rmqamqpt::Types::decodeShortString(&*properties.userId, &buffer)) {
+        if (!rmqamqpt::Types::decodeShortString(&*properties.userId, &buffer)) {
             BALL_LOG_ERROR << "Decoding fail for basic property: "
                            << PROPERTY_NAMES[USER_ID];
             success = false;