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/beforeGetOrDefaultAssignment.java

@@ -0,0 +1,13 @@
+// "Replace with 'getOrDefault' method call" "true"
+import java.util.Map;
+
+public class Main {
+
+  public void testGetOrDefault(Map<String, String> map, String key) {
+    Integer num = 123;
+    System.out.println(num);
+    num = map.get(key);
+    if(num == nu<caret>ll) num = 0;
+    System.out.println(num);
+  }
+}