test: update fixturesDir to fixtures.readKey in test-https-agent-servername.js
Update usage of fixturesDir
to fixtures.readKey
in test-https-agent-servername.js
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test