nils_for_nulls -> Msf::DBManager::Import::MetasploitFramework shared examples

MSP-11124

Author: limhoff-r7

spec/support/shared/examples/msf/db_manager/import.rb

@@ -5,7 +5,6 @@
   it { is_expected.to respond_to :import_file }
   it { is_expected.to respond_to :import_filetype_detect }
   it { is_expected.to respond_to :msf_import_timestamps }
-  it { is_expected.to respond_to :nils_for_nulls }
   it { is_expected.to respond_to :report_import_note }
   it { is_expected.to respond_to :rexmlify }
   it { is_expected.to respond_to :unserialize_object }

spec/support/shared/examples/msf/db_manager/import/metasploit_framework.rb

@@ -1,4 +1,6 @@
 shared_examples_for 'Msf::DBManager::Import::MetasploitFramework' do
+  it { is_expected.to respond_to :nils_for_nulls }
+
   it_should_behave_like 'Msf::DBManager::Import::MetasploitFramework::Credential'
   it_should_behave_like 'Msf::DBManager::Import::MetasploitFramework::XML'
   it_should_behave_like 'Msf::DBManager::Import::MetasploitFramework::Zip'