tests: retry to fire up VMs on vagrant failure

Add a script to retry several times to fire up VMs to avoid vagrant
failures.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
Co-authored-by: Andrew Schoen <aschoen@redhat.com>
(cherry picked from commit 1ecb3a9352)

tests/scripts/vagrant_up.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+retries=0
+until [ $retries -ge 5 ]
+do
+  echo "Attempting to start VMs. Attempts: $retries"
+  timeout 10m vagrant up "$@" && break
+  retries=$[$retries+1]
+  sleep 5
+done
+
+sleep 10

tox-update.ini

@@ -43,8 +43,7 @@ setenv=
 
 changedir={toxinidir}/tests/functional/all_daemons{env:CONTAINER_DIR:}
 commands=
-
-  vagrant up --no-provision {posargs:--provider=virtualbox}
+  bash {toxinidir}/tests/scripts/vagrant_up.sh --no-provision {posargs:--provider=virtualbox}
   bash {toxinidir}/tests/scripts/generate_ssh_config.sh {changedir}
 
   # use the stable-3.1 branch to deploy a jewel cluster

tox.ini

@@ -244,7 +244,7 @@ changedir=
 commands=
   rhcs: ansible-playbook -vv -i "localhost," -c local {toxinidir}/tests/functional/rhcs_setup.yml --extra-vars "change_dir={changedir}" --tags "vagrant_setup"
 
-  vagrant up --no-provision {posargs:--provider=virtualbox}
+  bash {toxinidir}/tests/scripts/vagrant_up.sh --no-provision {posargs:--provider=virtualbox}
   bash {toxinidir}/tests/scripts/generate_ssh_config.sh {changedir}
 
   # configure lvm