Add test case for ivy customization

A bug in ivy (tickled by maven leaving a pom
but no jar in the local repo) would make the
default Grapes ivy config fail (cannot grab...).
Phil's workaround now has a test case.

spring-boot-cli/src/test/resources/foo.pom

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project
+		xmlns="http://maven.apache.org/POM/4.0.0"
+		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		xsi:schemaLocation="
+				http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>foo</groupId>
+	<artifactId>foo</artifactId>
+	<packaging>jar</packaging>
+	<version>1.0</version>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+
+</project>