CHE-995: mark architecture field as beta

Signed-off-by: Alexander Garagatyi <agaragatyi@codenvy.com>

core/che-core-api-model/pom.xml

@@ -22,6 +22,10 @@
     <packaging>jar</packaging>
     <name>Che Core :: API :: Model</name>
     <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.eclipse.che.core</groupId>
             <artifactId>che-core-commons-annotations</artifactId>

core/che-core-api-model/src/main/java/org/eclipse/che/api/core/model/machine/MachineConfig.java

@@ -10,6 +10,8 @@
  *******************************************************************************/
 package org.eclipse.che.api.core.model.machine;
 
+import com.google.common.annotations.Beta;
+
 import org.eclipse.che.commons.annotation.Nullable;
 
 import java.util.List;
@@ -60,6 +62,10 @@ public interface MachineConfig {
 
     /**
      * Architecture of target machine. Default is 'linux_amd64'.
+     *
+     * <p/>This method is in beta. And can be removed in next versions.
      */
+    // todo remove after resolving CHE-995
+    @Beta
     String getArchitecture();
 }