Removing tool_proxy_guid assignment on deployment_request object.

[pfgray]

Hiya,

Attempts to call

Lti2Tc::ToolRegistration.register_tool

with a valid deployment_request

are met with the error:

undefined method `tool_proxy_guid=' for #<Lti2Tc::DeploymentRequest:0x007ff216809e58>

/apps/LTI2-Reference/lti2_tc/app/models/lti2_tc/tool_registration.rb:27:in `register_tool'
app/admin/register_new_tool.rb:26:in `block (2 levels) in <top (required)>'
/apps/tmp/vendor/bundle/ruby/2.1.0/bundler/gems/active_admin-e3a7354c0196/lib/active_admin/views/pages/page.rb:8:in `instance_exec'
...

I believe this assignment (er method call? new to ruby...) was added in error, as tool_proxy_guid is not an attribute on Lti2Tc::DeploymentRequest instances, and the tool_proxy_guid is passed in later:

html_body = deployment_request.create_lti_message( tc_deployment_url, user.id, tool_proxy_guid )

Not exactly sure if this is correct, since this is literally the first ruby code I've written, but it solves the issue I've been having trying to run the LTI2 consumer.