Photon 2.0 Bug fix to properly identify VMware Photon OS.

[ankurdh]

In the Photon 2.0 release, /etc/photon-release doesn't have VMware Photon Linux anymore. It contains:

root@photon-2.0-ankurh [ ~ ]# cat /etc/photon-release
VMware Photon OS 2.0

Fixing the code to grep for only VMware Photon instead of VMware Photon Linux. Other tiny changes include:

• Fix the README file with the proper bundle command
• Fix the gemspec file to have a rspec version < 11.0 because of https://stackoverflow.com/questions/35893584/nomethoderror-undefined-method-last-comment-after-upgrading-to-rake-11

Testing output:

 huralikoppia@huralikoppia-m03 ~/code/vagrant-guests-photon $ rspec                                                                                                                      ✔  5058  15:27:40
[Coveralls] Set up the SimpleCov formatter.
[Coveralls] Using SimpleCov's default settings.
..........

Finished in 0.01164 seconds
10 examples, 0 failures
[Coveralls] Outside the CI environment, not sending data.

[coveralls]

Coverage remained the same at 98.817% when pulling 4e8bbed on ankurdh:vmw_photon_2_readiness into 3c41310 on vmware:master.

[frapposelli]

Thanks @ankurdh just pushed version v1.0.5 to rubygems.