The debugger jump to the wrong source code for Step.java

[testforstephen]

My main class is called Step.java, but when the breakpoint was hit, the debugger jumps to the wrong step.class.

[testforstephen]

When search the fully qualified name Step, the search engine also matches the result com.sun.org.apache.xalan.internal.xsltc.compiler.Step. That's not accurate. Should filter the wrong match from results.

[akaroml]

This is related to "Just my code" feature which tries to navigate to users' own code when looking for source. Let's think of a systematical way to handle this problem.

[testforstephen]

duplicated with #121