Fix runWithRoles without api version in config (#26)

* prevent overwrting args by using cloned obj, fixes #23

* Update src/OpencastApi/Rest/OcRestClient.php

Co-authored-by: reiferschris <34450887+reiferschris@users.noreply.github.com>

* force no header on aux version call

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Co-authored-by: reiferschris <34450887+reiferschris@users.noreply.github.com>

src/OpencastApi/Rest/OcRestClient.php

@@ -140,7 +140,10 @@ public function hasVersion($version)
     {
         if (empty($this->version)) {
             try {
-                $defaultVersion = $this->performGet('/api/version/default');
+                // We have to use an aux object, in order to prevent overwriting arguments of current object.
+                $aux = clone $this;
+                $aux->enableNoHeader();
+                $defaultVersion = $aux->performGet('/api/version/default');
                 if (!empty($defaultVersion['body']) && isset($defaultVersion['body']->default)) {
                     $this->setVersion(str_replace(['application/', 'v', '+json'], ['', '', ''], $defaultVersion['body']->default));
                 } else {