Merge pull request #998 from edx/derf/put_instanceid_in_prompt

include AWS instanceID in prompt

playbooks/roles/user/templates/default.bashrc.j2

@@ -53,10 +53,12 @@ if [ -n "$force_color_prompt" ]; then
     fi
 fi
 
+command -v ec2metadata >/dev/null 2>&1 && {  INSTANCEID=$(ec2metadata --instance-id); }
+
 if [ "$color_prompt" = yes ]; then
-    PS1='{{ USER_CMD_PROMPT }}${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
+    PS1='{{ USER_CMD_PROMPT }}${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h $INSTANCEID\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
 else
-    PS1='{{ USER_CMD_PROMPT}}${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
+    PS1='{{ USER_CMD_PROMPT}}${debian_chroot:+($debian_chroot)}\u@\h $INSTANCEID:\w\$ '
 fi
 unset color_prompt force_color_prompt