Fixing 'nbls.project.resolveProjectProblems' command name.

[lahodaj]

The server defines nbls.project.resolveProjectProblems command to resolve project problems. The name makes sense to me, as it can resolve problems for any projects, I believe, not only Java-related projects.

But, JavaErrorProvider tries to use nbls.java.project.resolveProjectProblems, which obviously fails, as that command does not exist.

The proposed fix is to simply use the correct name in JavaErrorProvider.

[lahodaj]

Turned out that when the priming build fails, there is no notification to the user. Trying to improve that in: https://github.com/apache/netbeans/pull/7370/commits/d826509b9b3f69101ce2526cb864722d71ded220