Extract EnvSetupFilter#mergeInSecurityConfigurations from #getEnvironment.
Extract EnvSetupFilter#buildSecurityConfigurationKeyMap from #getEnvironment.
Rename EnvSetupFilter#getEnvironment to #buildEnvironment in order to better reflect its actual purpose.
Extract EnvSetupFilter#addHomeSiteURLs from SiteConfiguration, in anticipation of decoupling SiteConfiguration from Environment.
Remove extraneous SiteConfiguration#seedEnvironment.
Removed extraneous instance variable from EnvSetupFilter#addHomeSiteURLs, as its class is now nothing but static variables.
Remove comments documenting intent already expressed in the code itself.