(MAINT) Silence log output during test
(SERVER-89) Add default dnsAltNames to master certificate

This commit changes the master certificate generation to always include
the subject DNS alt names extension. If none are specified, then a
default value of "puppet" will be used.
Merge pull request #251 from nwolfe/svr89-default-dns-alt-names

(SERVER-89) Add default dnsAltNames to master certificate