fix: Set default config path and raise error for inaccessible file

Set default config path to `/etc/revpipyload/revpipyload.conf` and raise
error for inaccessible config files.

Signed-off-by: Sven Sager <akira@narux.de>

src/revpipyload/proginit.py

@@ -56,7 +56,7 @@ def configure():
     )
     parser.add_argument(
         "-c", "--conffile", dest="conffile",
-        default="revpipyload.conf",
+        default="/etc/revpipyload/revpipyload.conf",
         help="Application configuration file"
     )
     parser.add_argument(

src/revpipyload/revpipyload.py

@@ -211,7 +211,9 @@ class RevPiPyLoad:
         proginit.logger.info(
             "loading config file: {0}".format(proginit.globalconffile)
         )
-        self.globalconfig.read(proginit.globalconffile)
+        if not self.globalconfig.read(proginit.globalconffile):
+            raise RuntimeError("can not access config file '{0}'".format(proginit.globalconffile))
+
         self.__translate_config()
         proginit.conf = self.globalconfig