Spring Support: Fix tests in IDEA 2017.1

Filter out duplicate reference targets.
Fix test data as directory references are available
inside of string literals.
Fix test data as Spring @Autowired inspection
no more reports parameterless methods.
Fix gutter checking as configuration bean references now resolve
to @ComponentScan annotation

ultimate/testData/spring/core/references/navigation/packageReferenceInComponentScan.kt

@@ -1,5 +1,6 @@
 // NO_XML_CONFIG
 // REF: java
+// REF: java.java
 
 import org.springframework.context.annotation.ComponentScan
 import org.springframework.context.annotation.Configuration