Fix version of Maven in a few places

This is kind of a tactical fix while we work out how to do it
better. The issue comes back to Spring Cloud Contract. They use Maven
3.6.2 (which isn't compatible with either the thin launcher or Spring
Boot CLI).

spring-cloud-cli-integration-tests/pom.xml

@@ -16,6 +16,16 @@
 		<version>2.2.0.BUILD-SNAPSHOT</version>
 	</parent>
 
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.apache.maven</groupId>
+				<artifactId>maven-settings-builder</artifactId>
+				<version>${maven.version}</version>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
@@ -46,6 +56,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<java.version>1.8</java.version>
 		<maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
+		<maven.version>3.5.4</maven.version>
 	</properties>
 
 	<build>

spring-cloud-launcher/spring-cloud-launcher-cli/pom.xml

@@ -16,6 +16,20 @@
 		<version>2.2.0.BUILD-SNAPSHOT</version>
 	</parent>
 
+	<properties>
+		<maven.version>3.5.4</maven.version>
+	</properties>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.apache.maven</groupId>
+				<artifactId>maven-settings-builder</artifactId>
+				<version>${maven.version}</version>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>

spring-cloud-launcher/spring-cloud-launcher-deployer/pom.xml

@@ -1,5 +1,6 @@
 <?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"
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
@@ -20,6 +21,7 @@
 		<spring-cloud-deployer.version>2.0.4.RELEASE</spring-cloud-deployer.version>
 		<spring-cloud-deployer-resource-support.version>2.0.3.RELEASE</spring-cloud-deployer-resource-support.version>
 		<spring-cloud-deployer-thin.version>1.0.22.RELEASE</spring-cloud-deployer-thin.version>
+		<maven.version>3.3.9</maven.version>
 	</properties>
 
 	<dependencyManagement>
@@ -48,7 +50,12 @@
 			<dependency>
 				<groupId>org.apache.maven</groupId>
 				<artifactId>maven-aether-provider</artifactId>
-				<version>3.3.9</version>
+				<version>${maven.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.apache.maven</groupId>
+				<artifactId>maven-settings-builder</artifactId>
+				<version>${maven.version}</version>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>