Looks like your Solr instance start up time is a bit higher than usual.
You should increase PostDelay settings.
Inside of installation package, search for sitecore-solr.json and modify PostDelay setting to 30 seconds:
"Description" : "Starts the Solr service.",
XConnectEnvironment ( Content copied from: http://thebitsthatbyte.com/sitecore-9-feature-xconnect-configuration-environment-xconnectenvironment-sif-parameter/ ) It actually unlocks a powerful feature of Sitecore 9 where you are able to set the configuration environment of xConnect allowing you to leverage different configurations for differing environments/...