Update to work with latest Nim devel and cliutil updates.

src/test/nim/run_functional_tests.nim

@@ -1,3 +1,3 @@
 import unittest
 
-import ./functional/tserver.nim
+import ./functional/tserver

src/test/nim/run_unit_tests.nim

@@ -1,4 +1,4 @@
 import unittest
 
-import ./unit/tserver.nim
-import ./unit/tconfiguration.nim
+import ./unit/tserver
+import ./unit/tconfiguration