Java8CollectionsApiInspection & Java8ReplaceMapGetInspection merged into Java8MapApiInspection; support method references in computeIfAbsent

fix for IDEA-163932 Map.get suggested replacement with Map.getOrDefault is misleading

java/java-tests/testData/inspection/java8MapApi/beforeGetOrDefaultExtends.java

@@ -0,0 +1,13 @@
+// "Replace with 'getOrDefault' method call" "false"
+import java.util.Map;
+
+public class Main {
+  public CharSequence test(Map<String, ? extends CharSequence> map) {
+    // cannot replace as map.getOrDefault("xyz", "none") will result in compilation error
+    if(map.co<caret>ntainsKey("xyz")) {
+      return map.get("xyz");
+    } else {
+      return "none";
+    }
+  }
+}