Clean up stale records in /etc/hosts before adding new ones with the same host #80

Author: paliarush

README.md

@@ -451,4 +451,3 @@ bash ./<test-name>.sh
     * Make changes in `etc/docker/monolith/Dockerfile`
     * Run `./k-upgrade-environment`
     * Run `./k-status` to open kubernetes dashboard and delete Replica Set named `magento2-monolith-*`. The container should be restarted and its Age should reset
- 1. If you are unable to ping your local Magento install, open the `/etc/hosts` file and search for your Magento instance URL. If you find multiple references to the same URL, preserve the first one you find and delete the others. 

scripts/host/configure_etc_hosts.sh

@@ -14,6 +14,12 @@ if [[ ${debug_devbox_project} -eq 1 ]]; then
     set -x
 fi
 
+# remove potentially stale configuration of the hosts configured by the dev box
+for instance_name in $(getInstanceList); do
+    domain_name="$(getInstanceDomainName ${instance_name})"
+    sudo sed -ie "/.*${domain_name}.*/d" /etc/hosts
+done
+
 etc_hosts_records="$(bash "${devbox_dir}/scripts/host/get_etc_hosts_records.sh")"
 # only split with new lines
 IFS=$'\n'