StreamToLoopInspection: added ExplicitCollectTerminalOperation; StreamVariable simplified; guard checks added (IDEA-CR-15249)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeReusedVar.java

@@ -0,0 +1,13 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.List;
+
+public class Main {
+  private static void test(List<String> list) {
+    long count = list.stream().filter(s -> !s.isEmpty()).co<caret>unt();
+    if(count > 10) {
+      long result = count*2;
+      System.out.println(result);
+    }
+  }
+}