Improved error reporting

Author: paliarush

scripts/host/check_mounted_directories.sh

@@ -7,7 +7,8 @@ source "${vagrant_dir}/scripts/output_functions.sh"
 cd "${vagrant_dir}"
 if [[ ! -f "${vagrant_dir}/etc/guest/mysql/my.cnf" ]]; then
     error "Directory '${vagrant_dir}/etc' was not mounted as expected by Vagrant.
-        Please make sure that Vagrant is able to mount VirtualBox shared folders on your environment (see https://www.vagrantup.com/docs/synced-folders/basic_usage.html )"
+        Please make sure that 'paliarush/magento2.ubuntu' Vagrant box was downloaded successfully (if not, this may help http://stackoverflow.com/questions/35519389/vagrant-cannot-find-box)
+        And that Vagrant is able to mount VirtualBox shared folders on your environment (see https://www.vagrantup.com/docs/synced-folders/basic_usage.html )"
     exit 1
 fi
 vagrant ssh -c "bash /vagrant/scripts/guest/check_mounted_directories" 2> >(logError)