Updating to modulemd v2

Signed-off-by: Petr Šabata <contyk@redhat.com>

container-tools.yaml

@@ -1,6 +1,6 @@
 ---
 document: modulemd
-version: 1
+version: 2
 data:
     summary: Common tools and dependencies for container runtimes
     description: Contains SELinux policies, binaries and other
@@ -9,12 +9,12 @@ data:
         module:
             - MIT
     dependencies:
-        buildrequires:
-            platform: f28
-            golang: "1.10"
-            golang-ecosystem: "2017.0"
-        requires:
-            platform: f28
+        - buildrequires:
+              platform: []
+              golang: [1.10]
+              golang-ecosystem: [2017.0]
+          requires:
+              platform: []
     references:
         community: https://github.com/projectatomic
         documentation: https://projectatomic.io