Fix slave's log directory (#220)

* typo

* fix missing cwd for slaves

RLTest/__main__.py

@@ -195,7 +195,7 @@ def do_normal_conn(self, line):
 
 parser.add_argument(
     '--clear-logs', action='store_const', const=True, default=False,
-    help='deleting the log direcotry before the execution')
+    help='deleting the log directory before the execution')
 
 parser.add_argument(
     '--log-dir', default='./logs',

RLTest/redis_std.py

@@ -383,7 +383,8 @@ def startEnv(self, masters = True, slaves = True):
         if self.useSlaves and slaves and self.slaveProcess is None:
             if self.verbose:
                 print(Colors.Green("Redis slave command: " + ' '.join(self.slaveCmdArgs)))
-            self.slaveProcess = subprocess.Popen(args=self.slaveCmdArgs, env=self.slaveOSEnv, **options)
+            self.slaveProcess = subprocess.Popen(args=self.slaveCmdArgs, env=self.slaveOSEnv, cwd=self.dbDirPath,
+                                                 **options)
             time.sleep(0.1)
             if self._isAlive(self.slaveProcess):
                 con = self.getSlaveConnection()
@@ -427,7 +428,7 @@ def _segfault(self, role, retries=3):
             else:
                 return
         print(Colors.Bred('Failed killing processes with sigkill.'))
-    
+
     def stopEnvWithSegFault(self, masters = True, slaves = True):
         if self.masterProcess is not None and masters is True:
             self._segfault(MASTER)