puppet: Fix hacky release test for whether we're in EC2.
puppet: Fix hacky release test for whether we're in EC2.

The result is still a bit hacky, but guaranteed to be correct if we
adjust the OS version of our systems, which we of course will do over
time.

andersk/zulip,rht/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,kou/zulip,tommyip/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,rht/zulip,punchagan/zulip,zulip/zulip,timabbott/zulip,synicalsyntax/zulip,eeshangarg/zulip,tommyip/zulip,hackerkid/zulip,showell/zulip,rishig/zulip,synicalsyntax/zulip,shubhamdhama/zulip,timabbott/zulip,punchagan/zulip,tommyip/zulip,kou/zulip,showell/zulip,timabbott/zulip,shubhamdhama/zulip,zulip/zulip,timabbott/zulip,andersk/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,shubhamdhama/zulip,rishig/zulip,synicalsyntax/zulip,brainwane/zulip,andersk/zulip,zulip/zulip,showell/zulip,rishig/zulip,showell/zulip,punchagan/zulip,andersk/zulip,rht/zulip,rishig/zulip,synicalsyntax/zulip,timabbott/zulip,kou/zulip,showell/zulip,tommyip/zulip,eeshangarg/zulip,punchagan/zulip,rishig/zulip,rht/zulip,kou/zulip,synicalsyntax/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,timabbott/zulip,rishig/zulip,eeshangarg/zulip,shubhamdhama/zulip,eeshangarg/zulip,showell/zulip,hackerkid/zulip,rht/zulip,rishig/zulip,tommyip/zulip,brainwane/zulip,tommyip/zulip,zulip/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,brainwane/zulip,zulip/zulip,synicalsyntax/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,kou/zulip,synicalsyntax/zulip,brainwane/zulip,shubhamdhama/zulip,shubhamdhama/zulip,andersk/zulip,kou/zulip,brainwane/zulip,showell/zulip,brainwane/zulip,hackerkid/zulip,shubhamdhama/zulip,tommyip/zulip,rht/zulip