Align dependency versions with Spring 5.

See gh-131.

pom.xml

@@ -45,9 +45,8 @@
 		<spring-cloud-commons.version>2.0.0.BUILD-SNAPSHOT</spring-cloud-commons.version>
 		<httpclient.version>4.5.3</httpclient.version>
 		<httpcore.version>4.4.6</httpcore.version>
-		<netty.version>4.1.8.Final</netty.version>
-		<okhttp.version>2.7.5</okhttp.version>
-		<okhttp3.version>3.6.0</okhttp3.version>
+		<netty.version>4.1.11.Final</netty.version>
+		<okhttp3.version>3.8.0</okhttp3.version>
 	</properties>
 
 	<dependencyManagement>
@@ -102,12 +101,6 @@
 				<version>${netty.version}</version>
 			</dependency>
 
-			<dependency>
-				<groupId>com.squareup.okhttp</groupId>
-				<artifactId>okhttp</artifactId>
-				<version>${okhttp.version}</version>
-			</dependency>
-
 			<dependency>
 				<groupId>com.squareup.okhttp3</groupId>
 				<artifactId>okhttp</artifactId>

spring-cloud-vault-config-aws/pom.xml

@@ -28,7 +28,7 @@
 		</dependency>
 
 		<dependency>
-			<groupId>com.squareup.okhttp</groupId>
+			<groupId>com.squareup.okhttp3</groupId>
 			<artifactId>okhttp</artifactId>
 			<scope>test</scope>
 		</dependency>

spring-cloud-vault-config-databases/pom.xml

@@ -38,7 +38,7 @@
 		</dependency>
 
 		<dependency>
-			<groupId>com.squareup.okhttp</groupId>
+			<groupId>com.squareup.okhttp3</groupId>
 			<artifactId>okhttp</artifactId>
 			<scope>test</scope>
 		</dependency>

spring-cloud-vault-config-rabbitmq/pom.xml

@@ -34,7 +34,7 @@
 		</dependency>
 
 		<dependency>
-			<groupId>com.squareup.okhttp</groupId>
+			<groupId>com.squareup.okhttp3</groupId>
 			<artifactId>okhttp</artifactId>
 			<scope>test</scope>
 		</dependency>

spring-cloud-vault-config/pom.xml

@@ -59,12 +59,6 @@
 			<optional>true</optional>
 		</dependency>
 
-		<dependency>
-			<groupId>com.squareup.okhttp</groupId>
-			<artifactId>okhttp</artifactId>
-			<optional>true</optional>
-		</dependency>
-
 		<dependency>
 			<groupId>com.squareup.okhttp3</groupId>
 			<artifactId>okhttp</artifactId>