unified sics_command() with sics_client()

sea.py

@@ -81,7 +81,7 @@ class SeaManager(ServiceManager):
         if service != 'sea':  # ignore when service == 'graph'
             return ''
         try:
-            return sics_command(('localhost', self.info[ins]['sea']), 'samenv name')
+            return sics_client(('localhost', self.info[ins]['sea']), 'samenv name')
         except Exception as e:
             print(self.info)
             return repr(e)

sicsclient.py

@@ -49,14 +49,11 @@ def sics_coroutine(hostport, login):
         request = yield '\n'.join(result)
 
 
-def sics_client(hostport, login='Spy 007'):
+def sics_client(hostport, command=None, login='Spy 007'):
     sics = sics_coroutine(hostport, login)
     next(sics)  # start generator
-    return sics
-
-
-def sics_command(hostport, command, login='Spy 007'):
-    sics = sics_client(hostport, login)
+    if command is None:
+        return sics
     result = sics.send(command)
     sics.close()
     return result