logic: show real code of signatures in tooltips

* added new location type
* refactored old recording code
* record signature locations for cxx functions and java methods
* added signature locations to sample project indexer tests
* ignore signature locations in ui
* signatures in tooltip with qualified name of the function/method
* added test for finding signature location of constructor with initializer list

java_indexer/src/main/java/com/sourcetrail/JavaIndexerAstVisitorClient.java

@@ -68,6 +68,19 @@ public class JavaIndexerAstVisitorClient extends AstVisitorClient
 				access.getValue(), definitionKind.getValue());
 	}
 
+	@Override
+	public void recordSymbolWithLocationAndScopeAndSignature(
+			NameHierarchy symbolName, SymbolKind symbolKind, Range range,
+			Range scopeRange, Range signatureRange, AccessKind access, DefinitionKind definitionKind) 
+	{
+		JavaIndexer.recordSymbolWithLocationAndScopeAndSignature(
+				m_address, symbolName.serialize(), symbolKind.getValue(), 
+				range.begin.line, range.begin.column, range.end.line, range.end.column, 
+				scopeRange.begin.line, scopeRange.begin.column, scopeRange.end.line, scopeRange.end.column, 
+				signatureRange.begin.line, signatureRange.begin.column, signatureRange.end.line, signatureRange.end.column, 
+				access.getValue(), definitionKind.getValue());
+	}
+
 	@Override
 	public void recordReference(
 			ReferenceKind referenceKind, NameHierarchy referencedName,