JiraConfig: get project namekey when calling evict()

Due to the rename in I946e8df456424de52f694cdcf6456b77d452ae4c and
implementation change in I6a8e89eeeaaade329742f373b096b0d4623a4176.

Change-Id: Iad9cba3e47a6e65489d47995c7c5e94e28a35ab0

src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraConfig.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraConfig.java b/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraConfig.java
index e2bec95..b44d60e 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraConfig.java
@@ -135,7 +135,7 @@
         config.addCommentLinkSection(commentlinkSection);
         md.getCommitBuilder().setAuthor(serverUser);
         md.getCommitBuilder().setCommitter(serverUser);
-        projectCache.evict(config.getProject());
+        projectCache.evict(config.getProject().getNameKey());
         config.commit(md);
       }
     } catch (ConfigInvalidException | IOException e) {