spi binding: be ready for short names in handleRename (IDEA-164272)

java/java-tests/testData/spi/renamePackageWithImplementation/after/META-INF/services/java.lang.Runnable

@@ -0,0 +1 @@
+bar.foo1.FooRunnable

java/java-tests/testData/spi/renamePackageWithImplementation/after/bar/foo1/FooRunnable.java

@@ -0,0 +1,5 @@
+package bar.foo1;
+public class FooRunnable implements Runnable {
+    public void run() {
+    }
+}

java/java-tests/testData/spi/renamePackageWithImplementation/before/META-INF/services/java.lang.Runnable

@@ -0,0 +1 @@
+bar.foo.FooRunnable

java/java-tests/testData/spi/renamePackageWithImplementation/before/bar/foo/FooRunnable.java

@@ -0,0 +1,5 @@
+package bar.f<caret>oo;
+public class FooRunnable implements Runnable {
+    public void run() {
+    }
+}