If 'easyrsa' is being run by the unit-test then allow the default method
for 'build-ca' to be exercised.
The default 'easyrsa' method is to use temp-files, generated by EasyRSA,
to pass the CA passphrase, provided by the user, to the SSL command.
The normal 'unit-test' method to use a passphrase is to configure EasyRSA
ommand line options '--passin' and '--passout'.
The change made here is to simulate user-interaction and to supply a
default passphrase, as a user, to the SSL command.
To NOT use EasyRSA command line options to set any passphrase.
ONLY when being run by the unit-test.
Signed-off-by: Richard T Bonhomme <tincantech@protonmail.com>
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