Loading keystore resource if location starts with / (eclipse-ee4j#4258)

Loading keystore resource if location starts with /

Signed-off-by: David Kral <david.k.kral@oracle.com>

ext/microprofile/mp-rest-client/src/main/java/org/glassfish/jersey/microprofile/restclient/RestClientProducer.java

@@ -329,11 +329,14 @@ private InputStream locationToStream(String location) throws IOException {
 
         if (location.startsWith(CLASSPATH_LOCATION)) {
             String resource = location.substring(CLASSPATH_LOCATION.length());
-            // first try to read from teh same classloader as the rest client interface
+            // first try to read from the same classloader as the rest client interface
             InputStream result = interfaceType.getResourceAsStream(resource);
             if (null == result) {
                 // and if not found, use the context classloader (for example in TCK, this is needed)
                 result = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource);
+                if (result == null && resource.startsWith("/")) {
+                    result = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource.substring(1));
+                }
             }
             return result;
         } else if (location.startsWith(FILE_LOCATION)) {