Added ssh control master config to speed regression testing.

Added vagrant config for Centos 7.

test/vm/Vagrantfile

@@ -33,6 +33,7 @@ Vagrant.configure(2) do |config|
             # Setup SSH
             adduser --ingroup=vagrant --disabled-password --gecos "" backrest
             /backrest/test/vm/ssh/setup.sh
+            /backrest/test/vm/ssh/setup-cm.sh
 
             # Install required Perl modules
             apt-get install -y libdbd-pg-perl
@@ -71,6 +72,7 @@ Vagrant.configure(2) do |config|
             # Setup SSH
             adduser --ingroup=vagrant --disabled-password --gecos "" backrest
             /backrest/test/vm/ssh/setup.sh
+            /backrest/test/vm/ssh/setup-cm.sh
 
             # Install required Perl modules
             apt-get install -y libdbd-pg-perl
@@ -110,6 +112,31 @@ Vagrant.configure(2) do |config|
         SHELL
     end
 
+    config.vm.define "co7" do |co7|
+        co7.vm.box = "chef/centos-7.1"
+
+        co7.vm.provider :virtualbox do |vb|
+            vb.name = "backrest-test-centos-7.1"
+        end
+
+        # Provision the VM
+        co7.vm.provision "shell", inline: <<-SHELL
+            # Install db
+            sudo rpm -ivh http://yum.postgresql.org/9.3/redhat/rhel-7-x86_64/pgdg-centos93-9.3-1.noarch.rpm
+            sudo rpm -ivh http://yum.postgresql.org/9.4/redhat/rhel-7-x86_64/pgdg-centos94-9.4-1.noarch.rpm
+            yum -y install postgresql93-server
+            yum -y install postgresql94-server
+
+            # Install Perl and required modules
+            yum -y install perl perl-IO-String perl-Thread-Queue perl-JSON-PP perl-Digest-SHA perl-DBD-Pg
+
+            # Setup SSH
+            adduser -gvagrant -n backrest
+            /backrest/test/vm/ssh/setup.sh
+            /backrest/test/vm/ssh/setup-cm.sh
+        SHELL
+    end
+
   # Don't share the default vagrant folder
   config.vm.synced_folder ".", "/vagrant", disabled: true
 

test/vm/ssh/config

@@ -1,2 +1,2 @@
 Host *
-   StrictHostKeyChecking no
+    StrictHostKeyChecking no

test/vm/ssh/config-cm

@@ -0,0 +1,5 @@
+Host 127.0.0.1
+    StrictHostKeyChecking no
+    ControlMaster auto
+    ControlPath /tmp/%r@%h:%p
+    ControlPersist 30

test/vm/ssh/setup-cm.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# Copy ControlMaster ssh configs when the OS supports it
+
+cp -f /backrest/test/vm/ssh/config-cm /home/vagrant/.ssh/config
+cp -f /backrest/test/vm/ssh/config-cm /home/backrest/.ssh/config