try to fix the case the *_ROOT dir is not in sys.path

frappyman.py

@@ -46,7 +46,11 @@ class Config:
     def get(cls, cfgfile):
         if not cls.process_file:
             import logging
-            from frappy.config import process_file
+            try:
+                from frappy.config import process_file
+            except Exception as e:
+                print(sys.path)
+                raise
             from frappy.lib import generalConfig
             generalConfig.init()
             cls.log = logging.getLogger('frappyman')
@@ -165,9 +169,7 @@ class FrappyManager(ServiceManager):
             return [i for i in ins_list if i in cfgs]
 
     def get_nodes(self, ins='', service=None):
-        start_dir = ServiceManager.prepare_start(self, ins, None)[0]
-        if start_dir not in sys.path:
-            sys.path.insert(0, start_dir)
+        ServiceManager.prepare_start(self, ins, None)
         nodes = []
         services = self.services if service is None else [service]
         for service in services:
@@ -301,6 +303,7 @@ class FrappyManager(ServiceManager):
     def do_listcfg(self, ins='', service='', prt=print):
         if not ins:
              raise UsageError('missing instance')
+        ServiceManager.prepare_start(self, ins, service)
         self.all_cfg(ins, service, True)
         seacfgpat = re.compile(r'(.*)(\.config|\.stick|\.addon)')
         keylen = max((max(len(k) for k in cfgs) for cfgs in self.list_info.values()), default=1)