Q:

ORA-01882: timezone region not found in Liquibase Gradle plugin

In our project we are using Liquibase gradle plugin.  Recently, we updated ojdbc8 plugin to version 18.3.0.0.  Unfortunately, it caused our Liquibase task to fail with ORA-01882: timezone region not found.  I found some solutions for this error (e.g. there: ORA-01882: timezone region not found), but I have no idea how I could add this -Duser.timezone or  -Doracle.jdbc.timezoneAsRegion property to gradle task.  I tried different approaches, but with no success. 
This is how some crucial parts of our build.gradle look like:
liquibase {
    activities {
        oracle {
            changeLogFile "$liquibasePath/db.changelog-master.xml"
            driver liquibaseProps['oracle.driver']
            url "jdbc:oracle:thin:@${liquibaseProps['oracle.ip.port']}:${liquibaseProps['oracle.schema']}"
            username liquibaseProps['oracle.username']
            password liquibaseProps['oracle.password']
            outputDefaultSchema false
            outputDefaultCatalog false
        }
    }
}

def generate(taskName, taskDescription, generateCommand) {
    project.task(taskName, type: LiquibaseTask) {
        group = 'Liquibase'
        description = taskDescription

        inputs.property('databases', getRunList())
        inputs.dir liquibasePath
        outputs.dir sqlScriptsPath

        doLast {
            new LiquibaseSqlCleanupTask(sqlScriptsPath).execute()
        }
    }
}

A:

You need to set that as a system property when running gradle.  The docs for that are at https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_system_properties, but here is a copy/paste of the most relevant info:

Using the -D command-line option, you can pass a system property to
  the JVM which runs Gradle.  The -D option of the gradle command has the
  same effect as the -D option of the java command. 
You can also set system properties in gradle.properties files with the
  prefix systemProp. 

So you could create a gradle.properties file in the root directory of your project with contents like this:
systemProp.oracle.jdbc.timezoneAsRegion=false

