Recipe retouch for st2web

[arm4b]

Address notes missed in https://github.com/StackStorm/chef-stackstorm/pull/45. Finalize work on https://github.com/StackStorm/chef-stackstorm/issues/24

• [x] Generate self_signed certificate by default (conform with default installer logic)
• [x] Add missing Readme notes
• [x] web recipe should be self-sufficient (missing packagecloud repo)
• [x] InSpec
• [x] Fix nginx service on Ubuntu Trusty (upstream bug https://github.com/chef-cookbooks/chef_nginx/pull/55 https://github.com/chef-cookbooks/chef_nginx/issues/57)

[arm4b]

Related fixes made in upstream chef-nginx cookbook: https://github.com/chef-cookbooks/chef_nginx/pull/55 https://github.com/chef-cookbooks/chef_nginx/issues/57 https://github.com/chef-cookbooks/chef_nginx/pull/59

CentOS7 CI is failing due to different reason: https://github.com/StackStorm/chef-stackstorm/issues/58 (same for master)

[shortdudey123]

I think you can override the merge even though the CI test for centos7 fails since you are an admin

I will see what i can find for https://github.com/StackStorm/chef-stackstorm/issues/58

[arm4b]

Merged.

@shortdudey123 Thanks for taking a look!