Remove wrapper

- Removed wrapper.py
- Removed main.py
- modified radical-api.service to launch the gunicorn process directly.
- Removed exit code in update method.

core/wrapper.py

@@ -1,29 +0,0 @@
-"""Wrapper Class to handle reboots"""
-import subprocess
-import sys
-
-
-class Wrapper:
-    def __init__(self, args, stdout):
-        """
-        Wraps another program and helps with restarting should the program request.
-        :param args: Arguments used to run program
-        :param stdout: The stdout stream to send output to
-        """
-        self._args = args
-        self.process = None
-        self._stdout = stdout
-
-    def start(self):
-        """
-        Start the wrapper.
-        :return: None
-        """
-        self.process = subprocess.Popen(self._args, stdout=self._stdout)
-        while True:
-            while self.process.poll() is None:
-                pass
-            if self.process.returncode == 26:
-                self.process = subprocess.Popen(self._args, stdout=self._stdout)
-            else:
-                sys.exit()