ChefCompliance collector fix

[alexpop]

Fixes the following two exceptions when using the ChefCompliance collector:

           ================================================================================
           Error executing action `execute` on resource 'compliance_report[chef-server]'
           ================================================================================

           NameError
           ---------
           undefined local variable or method `blob' for #<Collector::ChefCompliance:0x00000005fbf040>

           Cookbook Trace:
           ---------------
           /tmp/kitchen/cache/cookbooks/audit/libraries/collector_classes.rb:236:in `send_report'
           /tmp/kitchen/cache/cookbooks/audit/libraries/report.rb:49:in `block (2 levels) in <class:ComplianceReport>'
           /tmp/kitchen/cache/cookbooks/audit/libraries/report.rb:24:in `block in <class:ComplianceReport>'

and:

           Error executing action `execute` on resource 'compliance_report[chef-server]'
           ================================================================================

           NameError
           ---------
           undefined local variable or method `run_context' for #<Collector::ChefCompliance:0x00000006826440>

           Cookbook Trace:
           ---------------
           /tmp/kitchen/cache/cookbooks/audit/libraries/helper.rb:33:in `handle_http_error_code'
           /tmp/kitchen/cache/cookbooks/audit/libraries/helper.rb:42:in `with_http_rescue'
           /tmp/kitchen/cache/cookbooks/audit/libraries/collector_classes.rb:243:in `block in send_report'
           /tmp/kitchen/cache/cookbooks/audit/libraries/collector_classes.rb:242:in `send_report'
           /tmp/kitchen/cache/cookbooks/audit/libraries/report.rb:49:in `block (2 levels) in <class:ComplianceReport>'
           /tmp/kitchen/cache/cookbooks/audit/libraries/report.rb:24:in `block in <class:ComplianceReport>'
           /tmp/kitchen/cache/cookbooks/compat_resource/files/lib/chef_compat/monkeypatches/chef/runner.rb:41:in `run_action'

[chris-rock]

Thanks @alexpop for this fix