Fix acceptance tests for #405

This fixes the acceptance tests by:
 - Ensuring the fqdn_rand_string spec is passed undef as the second
   parameter so that the seed is not used as the charset
 - Ensuring the pw_hash spec is passed the key specifying the type of
   hash, rather than the value that will be used to generate the
   password
 - Expecting puppet to report nil instead of empty string for undef
   passwords
 - Removing the fqdn_rand_base64 test because there is no such function

Author: Colleen Murphy

spec/acceptance/fqdn_rand_base64_spec.rb

@@ -44,7 +44,7 @@
       pp = <<-eos
       $l = 10
       $s = 'seed'
-      $o = fqdn_rand_string($l, $s)
+      $o = fqdn_rand_string($l, undef, $s)
       notice(inline_template('fqdn_rand_string is <%= @o.inspect %>'))
       eos
 

spec/acceptance/fqdn_rand_string_spec.rb

@@ -6,7 +6,7 @@
   describe 'success' do
     it 'hashes passwords' do
       pp = <<-EOS
-      $o = pw_hash('password', 6, 'salt')
+      $o = pw_hash('password', 'sha-512', 'salt')
       notice(inline_template('pw_hash is <%= @o.inspect %>'))
       EOS
 
@@ -17,12 +17,12 @@
 
     it 'returns nil if no password is provided' do
       pp = <<-EOS
-      $o = pw_hash('', 6, 'salt')
+      $o = pw_hash('', 'sha-512', 'salt')
       notice(inline_template('pw_hash is <%= @o.inspect %>'))
       EOS
 
       apply_manifest(pp, :catch_failures => true) do |r|
-        expect(r.stdout).to match(/pw_hash is ""/)
+        expect(r.stdout).to match(/pw_hash is nil/)
       end
     end
   end