Fix the SSL boolean test

Author: HD Moore

spec/support/shared/examples/metasploit/framework/login_scanner/http.rb

@@ -40,7 +40,7 @@
     context "without ssl, with non-default port" do
       subject(:http_scanner) { described_class.new(port:0) }
       it "should not set ssl" do
-        expect(http_scanner.ssl).to be_nil
+        expect(http_scanner.ssl).to be_falsey
         expect(http_scanner.port).to eq(0)
       end
     end