Intentions: Implement intention to replace camel-case test function name with a space-separated one

#KT-12489 Fixed
(cherry picked from commit 21e24a1)

idea/testData/intentions/convertCamelCaseTestFunctionToSpaced/unchanged.kt_ignored

@@ -0,0 +1,10 @@
+// CONFIGURE_LIBRARY: JUnit@lib/junit-4.12.jar
+// ERROR: Cannot access class 'java.lang.Class'. Check your module classpath for missing or conflicting dependencies
+// ERROR: This annotation is not applicable to target 'member function'
+// IS_APPLICABLE: false
+
+import org.junit.Test
+
+class A {
+    @Test fun `<caret>foo bar`() {}
+}