DATACMNS-1126 - Add Kotlin constructor support.

We now discover Kotlin constructors and apply parameter defaulting to allow construction of immutable value objects. Constructor discovery uses primary constructors by default and considers PersistenceConstructor annotations.

ClassGeneratingEntityInstantiator can instantiate Kotlin classes with default parameters by resolving the synthetic constructor. Null values translate to parameter defaults.

class Person(val firstname: String = "Walter") {
}

class Address(val street: String, val city: String) {

	@PersistenceConstructor
	constructor(street: String = "Unknown", city: String = "Unknown", country: String) : this(street, city)
}

pom.xml

@@ -231,6 +231,49 @@
 			<scope>test</scope>
 		</dependency>
 
+		<!-- Kotlin extension -->
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-stdlib</artifactId>
+			<version>${kotlin}</version>
+			<optional>true</optional>
+		</dependency>
+
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-reflect</artifactId>
+			<version>${kotlin}</version>
+			<optional>true</optional>
+		</dependency>
+
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-test</artifactId>
+			<version>${kotlin}</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.nhaarman</groupId>
+			<artifactId>mockito-kotlin</artifactId>
+			<version>1.5.0</version>
+			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>org.jetbrains.kotlin</groupId>
+					<artifactId>kotlin-stdlib</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>org.jetbrains.kotlin</groupId>
+					<artifactId>kotlin-reflect</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>org.mockito</groupId>
+					<artifactId>mockito-core</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+
 		<!-- Scala -->
 		<dependency>
 			<groupId>org.scala-lang</groupId>