Fixed a concurrency issue in NbGradleProject.tryWaitForLoadedProject (too early signal).
Minor cleanup in NbGradleProject equals and hashCode.
SimpleJavaProjectTest now waits for the project to be loaded properly.
Refactored SimpleJavaProjectTest.
Added tests that some important nodes are available in simple Java projects.
Minor refactoring in GradleProjectLogicalViewProvider.
Added check for javadoc action to SimpleJavaProjectTest.
Added tests for projects where the JavaProjectExtension is disabled.