adding a mininet vagrant box

Change-Id: I0c89c35a9e6768b3c3640c0895d405901e38799e
diff --git a/tools/dev/vagrant/ansible/roles/mininet/tasks/main.yml b/tools/dev/vagrant/ansible/roles/mininet/tasks/main.yml
new file mode 100644
index 0000000..105cbc4
--- /dev/null
+++ b/tools/dev/vagrant/ansible/roles/mininet/tasks/main.yml
@@ -0,0 +1,11 @@
+- name: git is present
+  apt:
+    name: git
+    force: yes
+  tags: [common]
+
+- name: Clone mininet repository
+  git: repo=https://github.com/mininet/mininet.git dest=mininet
+
+- name: Install mininet
+  command: mininet/util/install.sh -a