Fixed #365: Added check to config rake file (GRN-66) (#376)

* Added check to config rake file

* Update configuration.rake

lib/tasks/configuration.rake

@@ -29,10 +29,12 @@ namespace :conf do
     test_request("#{ENV['BIGBLUEBUTTON_ENDPOINT']}api/getMeetings?checksum=#{checksum}")
     passed
 
-    # Tests the checksum on the getMeetings api call
-    print "Checking SMTP connection"
-    test_smtp
-    passed
+    if ENV['ALLOW_MAIL_NOTIFICATIONS'] == 'true'
+      # Tests the configuration of the SMTP Server
+      print "Checking SMTP connection"
+      test_smtp
+      passed
+    end
   end
 end
 
@@ -50,7 +52,7 @@ rescue => exc
   failed("Error connecting to SMTP - #{exc}")
 end
 
-# takes the full URL including the protocol
+# Takes the full URL including the protocol
 def test_request(url)
   uri = URI(url)
   res = Net::HTTP.get(uri)