create a new gradle/groovy plugin

gent --name=<proj> kiy0taka/jenkins-plugin
cd <proj>
./gradlew server

change the coreVersion to 1.534

run ./gradlew clean test

this is the error

XXXXXXXXXXX~/java/test2$ ./gradlew clean test
:clean
:localizer
:stapler
:compileJava
warning: Supported source version 'RELEASE_6' from annotation processor 'jenkins.PluginSubtypeMarker' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.stapler.jsr269.ConstructorProcessor' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.stapler.jsr269.ExportedBeanAnnotationProcessor' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.stapler.jsr269.QueryParameterAnnotationProcessor' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.stapler.jsr269.RequirePOSTAnnotationProcessor' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.stapler.jsr269.WebMethodAnnotationProcessor' less than -source '1.7'
warning: No SupportedSourceVersion annotation found on org.kohsuke.wpc.ProcessorImpl, returning RELEASE_6.
warning: Supported source version 'RELEASE_6' from annotation processor 'org.kohsuke.wpc.ProcessorImpl' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.jvnet.hudson.annotation_indexer.AnnotationProcessorImpl' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'net.java.sezpoz.impl.Indexer6' less than -source '1.7'
Note: org.jenkinsci.plugins.HelloWorldBuilder.DescriptorImpl indexed under hudson.Extension
10 warnings
:compileGroovy
:processResources
:classes
:generate-test-hpl
:compileTestJava UP-TO-DATE
:compileTestGroovy
Deprecated: relying on packaging to define the extension of the main artifact is deprecated, and will not be supported in a future version of Gradle.
Download http://repo1.maven.org/maven2/org/jsoup/jsoup/1.7.1/jsoup-1.7.1.pom

FAILURE: Build failed with an exception.

• What went wrong:
  Could not resolve all dependencies for configuration ':testCompile'.
  > Could not find group:org.tmatesoft.sqljet, module:sqljet, version:1.1.0.
  Required by:
  org.jenkins-ci.plugins:test2:0.0.1-SNAPSHOT > org.jenkins-ci.main:jenkins-test-harness:1.534 > org.jenkins-ci.plugins:subversion:1.45 > org.jenkins-ci.svnkit:svnkit:1.7.6-jenkins-1
  > Could not find group:de.regnis.q.sequence, module:sequence-library, version:1.0.1.
  Required by:
  org.jenkins-ci.plugins:test2:0.0.1-SNAPSHOT > org.jenkins-ci.main:jenkins-test-harness:1.534 > org.jenkins-ci.plugins:subversion:1.45 > org.jenkins-ci.svnkit:svnkit:1.7.6-jenkins-1

I tried clearing the gradle cache and retrying and got the same error