Enable parallel building and parallel test-execution
Provide a configuration to still build/test serially on CI
via CI_BUILD=TRUE gradle --no-parallel --max-workers=1 clean build
Adjust Jenkins DSL to set CI_BUILD to avoid problems in CI
Adjust TestAllFiles to not fail when parallel builds are enabled
Reduce memory settings to reduce requirements on build-environments
Add gradle plugin to list task-dependencies

Thanks to Andreas Reichel for the PR

Closes #275

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1894812 13f79535-47bb-0310-9956-ffa450edef68

compile / jar / test of mrJars
don't include ants build.xml anymore
rename directories to match project and maven artifact names
refactor artifacts - so each project has one artifact
replace static references in hssf/dev tests with junit5 constructs, which had problems in parallel tests
increase gradle heap to 4gb because of OOM - maybe less would also work

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1888488 13f79535-47bb-0310-9956-ffa450edef68

update gradle files and project structure along https://github.com/centic9/poi/tree/gradle_build
remove eclipse IDE project files
remove obsolete record generator files

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1888111 13f79535-47bb-0310-9956-ffa450edef68

Adjust some tests to make them run fine in the Gradle build as well

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1763816 13f79535-47bb-0310-9956-ffa450edef68