Update to GWT 2.8.0-rc2

Uses upstream com.google GWT instead of com.vaadin.external.gwt

Change-Id: Id1c4391d167463082cf252e713d72ccd5f2d2303

client-compiler/pom.xml

@@ -21,7 +21,7 @@
 			<version>${project.version}</version>
 		</dependency>
 		<dependency>
-			<groupId>com.vaadin.external.gwt</groupId>
+			<groupId>com.google.gwt</groupId>
 			<artifactId>gwt-dev</artifactId>
 			<version>${vaadin.gwt.version}</version>
 		</dependency>

client/pom.xml

@@ -53,7 +53,7 @@
 
 		<!-- Needed GWT dependencies, includes gwt-user -->
 		<dependency>
-			<groupId>com.vaadin.external.gwt</groupId>
+			<groupId>com.google.gwt</groupId>
 			<artifactId>gwt-elemental</artifactId>
 			<version>${vaadin.gwt.version}</version>
 		</dependency>

pom.xml

@@ -29,7 +29,7 @@
 		<liferay.portal.version>6.0.2</liferay.portal.version>
 
 		<vaadin.sass.version>0.9.13</vaadin.sass.version>
-		<vaadin.gwt.version>2.7.0.vaadin3</vaadin.gwt.version>
+		<vaadin.gwt.version>2.8.0-rc2</vaadin.gwt.version>
 		<vaadin.plugin.version>8.0-SNAPSHOT</vaadin.plugin.version>
 
 		<javax.portlet.version>2.0</javax.portlet.version>

shared/pom.xml

@@ -22,7 +22,7 @@
 	<dependencies>
 		<!-- Needed GWT dependencies. Required parts are packaged to jar -->
 		<dependency>
-			<groupId>com.vaadin.external.gwt</groupId>
+			<groupId>com.google.gwt</groupId>
 			<artifactId>gwt-elemental</artifactId>
 			<version>${vaadin.gwt.version}</version>
 			<scope>provided</scope>
@@ -66,7 +66,7 @@
 						<configuration>
 							<artifactItems>
 								<artifactItem>
-									<groupId>com.vaadin.external.gwt</groupId>
+									<groupId>com.google.gwt</groupId>
 									<artifactId>gwt-elemental</artifactId>
 									<includes>
 										elemental/json/**,

uitest/pom.xml

@@ -120,13 +120,13 @@
 		</dependency>
 
 		<dependency>
-			<groupId>com.vaadin.external.gwt</groupId>
+			<groupId>com.google.gwt</groupId>
 			<artifactId>gwt-elemental</artifactId>
 			<version>${vaadin.gwt.version}</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
-			<groupId>com.vaadin.external.gwt</groupId>
+			<groupId>com.google.gwt</groupId>
 			<artifactId>gwt-servlet</artifactId>
 			<version>${vaadin.gwt.version}</version>
 		</dependency>