updated env setting to show the os we are working with

environments/aws/os/centos72.yml

diff --git a/environments/aws/os/centos72.yml b/environments/aws/os/centos72.yml
index 0897ca1..9c16a79 100644
--- a/environments/aws/os/centos72.yml
+++ b/environments/aws/os/centos72.yml
@@ -1,3 +1,4 @@
 ---
 # centos 7.2
-image_id: ami-7209f41f
\ No newline at end of file
+image_id: ami-7209f41f
+env_name: centos72

environments/aws/os/ol68.yml

diff --git a/environments/aws/os/ol68.yml b/environments/aws/os/ol68.yml
index 2bd045e..e0f03fe 100644
--- a/environments/aws/os/ol68.yml
+++ b/environments/aws/os/ol68.yml
@@ -1,3 +1,4 @@
 ---
 # oraclelinux 6.8
 image_id: ami-755ba918
+env_name: ol68

environments/aws/os/rhel72.yml

diff --git a/environments/aws/os/rhel72.yml b/environments/aws/os/rhel72.yml
index abcd309..dd185b3 100644
--- a/environments/aws/os/rhel72.yml
+++ b/environments/aws/os/rhel72.yml
@@ -1,3 +1,4 @@
 ---
 # rhel 7.2
 image_id: ami-2051294a
+`env_name: rhel72