Move IssueCommonality and Upvote specs out of models and into their own specs

spec/roles/upvote_spec.rb

@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+describe Issue, "Upvote" do
+  let(:issue) { create(:issue) }
+
+  it "with no notes has a 0/0 score" do
+    issue.upvotes.should == 0
+  end
+
+  it "should recognize non-+1 notes" do
+    issue.notes << create(:note, note: "No +1 here")
+    issue.should have(1).note
+    issue.notes.first.upvote?.should be_false
+    issue.upvotes.should == 0
+  end
+
+  it "should recognize a single +1 note" do
+    issue.notes << create(:note, note: "+1 This is awesome")
+    issue.upvotes.should == 1
+  end
+
+  it "should recognize multiple +1 notes" do
+    issue.notes << create(:note, note: "+1 This is awesome")
+    issue.notes << create(:note, note: "+1 I want this")
+    issue.upvotes.should == 2
+  end
+end