Move nexpose requires to appropriate module

MSP-11124

lib/msf/core/db_manager/import.rb

@@ -12,8 +12,6 @@ require 'uri'
 #
 
 require 'packetfu'
-require 'rex/parser/nexpose_simple_nokogiri'
-require 'rex/parser/nexpose_xml'
 require 'rex/parser/nmap_nokogiri'
 require 'rex/parser/nmap_xml'
 require 'rex/parser/openvas_nokogiri'

lib/msf/core/db_manager/import/nexpose/raw.rb

@@ -1,4 +1,5 @@
 require 'rex/parser/nexpose_raw_nokogiri'
+require 'rex/parser/nexpose_xml'
 
 module Msf::DBManager::Import::Nexpose::Raw
   def import_nexpose_raw_noko_stream(args, &block)

lib/msf/core/db_manager/import/nexpose/simple.rb

@@ -1,3 +1,5 @@
+require 'rex/parser/nexpose_simple_nokogiri'
+
 module Msf::DBManager::Import::Nexpose::Simple
   def import_nexpose_noko_stream(args, &block)
     if block