directly use facts object, rather than the name from facterdb

thanks to @bastelfreak for pointing this out

Author: igalic

spec/defines/global_config_entry_spec.rb

@@ -12,7 +12,7 @@
       end
 
       let(:npm_path) do
-        if os =~ /freebsd/i
+        if facts[:os]['family'] == 'FreeBSD'
           '/usr/local/bin/npm'
         else
           '/usr/bin/npm'

spec/defines/nodejs_npm_spec.rb

@@ -12,7 +12,7 @@
       end
 
       let(:npm_path) do
-        if os =~ /freebsd/i
+        if facts[:os]['family'] == 'FreeBSD'
           '/usr/local/bin/npm'
         else
           '/usr/bin/npm'