server functional tests use ServerTest class

Changing the test order for browser_test.rb is not the best idea in the
scope of this feature. Implementing a ServerTest class that inherits
from BrowserTest changing only the test order allows us to maintain
behaviour for browser tests and still have a random order for server
tests.

server/web2py/applications/vidjil/tests/functional/browser_test.rb

@@ -21,7 +21,7 @@ class BrowserTest < MiniTest::Test
   end
 
   def self.test_order
-    :random
+    :alpha
   end
 
   def setup

server/web2py/applications/vidjil/tests/functional/server_test.rb

+load 'browser_test.rb'
+class ServerTest < BrowserTest
+
+  def self.test_order
+    :random
+  end
+
+end
+

server/web2py/applications/vidjil/tests/functional/test_login.rb

 load 'vidjil_browser.rb'
-load 'browser_test.rb'
+load 'server_test.rb'
 
-class TestLogin < BrowserTest
+class TestLogin < ServerTest
 
   def setup
     super

server/web2py/applications/vidjil/tests/functional/test_pre_process.rb

 load 'vidjil_browser.rb'
-load 'browser_test.rb'
+load 'server_test.rb'
 
-class TestPreProcess < BrowserTest
+class TestPreProcess < ServerTest
 
   def setup
     super

server/web2py/applications/vidjil/tests/functional/test_sample.rb

 load 'vidjil_browser.rb'
-load 'browser_test.rb'
+load 'server_test.rb'
 
-class TestSample < BrowserTest
+class TestSample < ServerTest
 
   def setup
     super

server/web2py/applications/vidjil/tests/functional/test_sample_set.rb

 load 'vidjil_browser.rb'
-load 'browser_test.rb'
+load 'server_test.rb'
 
-class TestSampleSet < BrowserTest
+class TestSampleSet < ServerTest
 
   def setup
     super

server/web2py/applications/vidjil/tests/functional/test_tag.rb

 load 'vidjil_browser.rb'
-load 'browser_test.rb'
+load 'server_test.rb'
 
-class TestTag < BrowserTest
+class TestTag < ServerTest
 
   def setup
     super