removed ScmContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed TriggerContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed PublisherContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed StepContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed AuthorizationContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed MultiScmContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed WrapperContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed BuildFlowHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed BuildParametersContextHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed MatrixHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed MavenHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed TopLevelHelper

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed StaticAnalysisPublisherContext

The ContextHelper classes cause problems with IDE integration because IDEA
does not detect DelegatesTo annotations in delegates. And it is strange
that the first context/closure level uses the helper classes and deeper
levels don't. So they get removed.
removed some unused interfaces and abstract classes, renamed AbstractContextHelper to ContextHelper since it's not abstract any more
renamed test specifications to match the name of the class being tested
JobTest cleanup
renamed all test specifications to use Spec suffix
enable IDE support for IDEA