Release bundles unnecessary applications about emqx-rel HOT 1 CLOSED

{application, public_key,
  [{description, "Public key infrastructure"},
   {vsn, "1.4"},
   {modules, [    public_key,
          pubkey_pem,
          pubkey_pbe,
          pubkey_ssh,
          pubkey_cert,
          pubkey_cert_records,
          pubkey_crl,
          'OTP-PUB-KEY',
          'PKCS-FRAME'
            ]},
   {applications, [asn1, crypto, kernel, stdlib]},
   {registered, []},
   {env, []},
   {runtime_dependencies, ["stdlib-2.0","kernel-3.0","erts-6.0","crypto-3.3",
               "asn1-3.0"]}
   ]
}.