Embed private key in ct_integration_test.cfg
Embed private key in ct_integration_test.cfg

Now both the public and private key are embedded in the config file.
The private key DER was obtained by running:
openssl pkey -in trillian/testdata/ct-http-server.pubkey.pem

The password used was "dirk".

daviddrysdale/certificate-transparency-go,google/certificate-transparency-go,RJPercival/certificate-transparency-go,daviddrysdale/certificate-transparency-go,daviddrysdale/certificate-transparency-go,RJPercival/certificate-transparency-go,google/certificate-transparency-go,google/certificate-transparency-go,RJPercival/certificate-transparency-go