reverted security inject changes

Signed-off-by: Petar Dzepina <[email protected]>

Author: petardz

src/main/kotlin/org/opensearch/indexmanagement/opensearchapi/OpenSearchExtensions.kt

@@ -290,12 +290,7 @@ class IndexManagementSecurityContext(
      */
     override fun updateThreadContext(context: CoroutineContext) {
         logger.debug("Setting security context in thread ${Thread.currentThread().name} for job $id")
-        if (user == null) {
-            injector.injectRoles(DEFAULT_INJECT_ROLES)
-        } else {
-            injector.injectRoles(user.roles)
-            injector.injectUser(user.name)
-        }
+        injector.injectRoles(if (user == null) DEFAULT_INJECT_ROLES else user.roles)
         injector.injectProperty(INTERNAL_REQUEST, true)
     }