Allow newer SVN to be installed

roles/ubuntu-slaves/tasks/install_libraries.yml

diff --git a/roles/ubuntu-slaves/tasks/install_libraries.yml b/roles/ubuntu-slaves/tasks/install_libraries.yml
index 522a85d..a576a8d 100644
--- a/roles/ubuntu-slaves/tasks/install_libraries.yml
+++ b/roles/ubuntu-slaves/tasks/install_libraries.yml
@@ -21,10 +21,10 @@
     sudo_user: root
     apt_repository: repo='deb https://get.docker.io/ubuntu docker main' state=present
 
-  - name: Install_svn-1.6 | downgrade source.list 
+  - name: Install_svn-1.6 | remove subversion.list
     sudo: yes
     sudo_user: root
-    copy: src=subversion.list dest=/etc/apt/sources.list.d/
+    file: path=/etc/apt/sources.list.d/subversion.list state=absent
     
   - name: apt-get update
     sudo: yes
@@ -32,21 +32,10 @@
     apt: update_cache=yes
     tags: install_libraries
     
-  - name: Install_svn-1.6 | downgrade svn-1.6
+  - name: Install_svn-1.6 | unpin svn versions
     sudo: yes
     sudo_user: root
-    apt: pkg={{item}} default_release=precise state=latest dpkg_options=force-confdef,force-confold,force-downgrade
-    with_items:
-      - libsvn1
-      - python-svn
-      - subversion
-      - libsvn-dev
-    tags: install_libraries
-
-  - name: Install_svn-1.6 | pin svn versions
-    sudo: yes
-    sudo_user: root
-    command: echo "{{item}} hold" | dpkg --set-selections
+    command: echo "{{item}} install" | dpkg --set-selections
     with_items:
       - libsvn1
       - python-svn
@@ -168,6 +157,10 @@
       - tmux
       - unzip
       - xvfb
+      - libsvn1
+      - python-svn
+      - subversion
+      - libsvn-dev
 
   - name: "Installing rvm"
     sudo: yes