BAEL-890 - Kotlin-Allopen with Spring example (#2582)

* Different types of bean injection in Spring

* Difference between two dates in java

* Update README.md

* Simple clean of difference between dates

* Clean my test article

* Improve dates diff: for dates and datetimes

* Move difference between dates from core-java to libraries

* BAEL-890 - Kotlin-Allopen with Spring example

spring-mvc-kotlin/src/main/kotlin/com/baeldung/kotlin/allopen/SimpleConfiguration.kt

@@ -0,0 +1,7 @@
+package com.baeldung.kotlin.allopen
+
+import org.springframework.context.annotation.Configuration
+
+@Configuration
+class SimpleConfiguration {
+}

spring-mvc-kotlin/src/test/kotlin/com/baeldung/kotlin/allopen/SimpleConfigurationTest.kt

@@ -0,0 +1,19 @@
+package com.baeldung.kotlin.allopen
+
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.springframework.test.context.ContextConfiguration
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner
+import org.springframework.test.context.support.AnnotationConfigContextLoader
+
+@RunWith(SpringJUnit4ClassRunner::class)
+@ContextConfiguration(
+        loader = AnnotationConfigContextLoader::class,
+        classes = arrayOf(SimpleConfiguration::class))
+class SimpleConfigurationTest {
+
+    @Test
+    fun contextLoads() {
+    }
+
+}