Update Rspec expected thread count

External modules start threads during the test run, so the thread
manager is always running by the end in addition to the main VM thread.

lib/metasploit/framework/spec/threads/suite.rb

@@ -12,7 +12,7 @@ module Metasploit
           #
 
           # Number of allowed threads when threads are counted in `after(:suite)` or `before(:suite)`
-          EXPECTED_THREAD_COUNT_AROUND_SUITE = if ENV['REMOTE_DB'] then 2 else 1 end
+          EXPECTED_THREAD_COUNT_AROUND_SUITE = 2
 
           # `caller` for all Thread.new calls
           LOG_PATHNAME = Pathname.new('log/metasploit/framework/spec/threads/suite.log')