Encrypt OAuth key for deployment.

GitHub apparently now scans commits on public repositories for OAuth
keys and automatically revokes keys found as a precaution. To protect
the key, encrypt it with the public key from Travis CI for our
repository.

.travis.yml

@@ -5,8 +5,9 @@ install: ant bootstrap
 script: ant clean test jar
 deploy:
   provider: releases
-  api_key: "3964a41d5651a40cde25708e196749a7f2d70ef8"
-  file: "build/ApacheJMeter_rmi.jar"
+  api_key:
+    secure: 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
+  file: build/ApacheJMeter_rmi.jar
   skip_cleanup: true
   on:
     tags: true