ipareplica_test: Added ntp_server, ntp_pool and some ntp related tests

ntp_server and ntp_pool are now provided to ipareplica_test. A conflict
test with no_ntp has been added from the normal installer.

Also added are references to options.password and options.dm_password, but
these are commented out and not used or provided to the module.

Proper ntp_servers and ntp_pool tests are needed still.