build.gradle
    added gradle plugins repository
removed ZmtDeployPlugin.groovy
added ZmtDochostPlugin.groovy
ZmtDistributionPlugin.groovy
    moved ssh initialization from removed ZmtDeployPlugin
ZmtLibraryPlugin, ZmtSimulationPlugin.groovy
    replaced ZmtDeployPlugin with ZmtDochostPlugin
    updated tests
ZmtPublishPlugin.groovy
    gets repository host from determineCredentials task
    gets credentials from credentials container
ZmtExternalPlugin.groovy
    applies ZmtDochostPlugin
    fixed / updated test