Bug 442781 - Support hyperlinks for stack entries with method signature

JVMs like SAP JVM may add method signatures in stack traces.  Correctly
parse these stack entries in JDT's stack trace console.

Also add lighweight tests for hyperlink detection for both classic and
extended stack entries.

Change-Id: I25c3039deda3d6b77b4d00e41e692988cb5b0aa2
Signed-off-by: Christian Georgi <christian.georgi@sap.com>