Fix tests

test/tc_lxc_undefined.rb

@@ -5,7 +5,7 @@ require 'lxc'
 
 class TestLXCUndefined < Test::Unit::TestCase
   def setup
-    @name = 'test'
+    @name = 'test_undefined'
     @container = LXC::Container.new(@name)
   end
 
@@ -15,19 +15,18 @@ class TestLXCUndefined < Test::Unit::TestCase
   end
 
   def test_container_not_defined
-    assert_equal(false, @container.defined?)
+    assert(!@container.defined?)
   end
 
   def test_container_init_pid
-    assert_equal(nil, @container.init_pid)
+    assert_nil(@container.init_pid)
   end
 
   def test_container_not_running
-    assert_equal(false, @container.running?)
+    assert(!@container.running?)
   end
 
   def test_container_stopped
-    assert_equal(false, @container.running?)
     assert_equal('STOPPED', @container.state)
   end
 end