Fix bug: relative execution_directory does not work

bin/psot

@@ -53,7 +53,7 @@ def generate_execution(config, args):
     execution['fasta'] = os.path.abspath(args.fasta)
     execution['output'] = os.path.abspath(args.output)
     if args.execution_dir:
-        execution['directory'] = args.execution_dir
+        execution['directory'] = os.path.abspath(args.execution_dir)
     else:
         execution['directory'] = tempfile.mkdtemp()
     execution['modules'] = generate_execution_modules_for_profile(config, args.profile)