disable ZFS mnttab_cache

Author: gronke

.travis/mypy-stubs/libzfs.pyi

@@ -77,7 +77,12 @@ class ZFS:
     pools: Generator[ZFSPool, None, None] = ...
     snapshots: Generator[ZFSSnapshot, None, None] = ...
     __pyx_vtable__ = ... # type: Any
-    def __init__(self, history: bool=True, history_prefix: str='') -> None: ...
+    def __init__(
+        self,
+	history: bool=True,
+	history_prefix: str='',
+	mnttab_cache: bool=True
+    ) -> None: ...
     def create(
         self,
         name: str,

libioc/ZFS.py

@@ -280,7 +280,11 @@ def get_zfs(
     history_prefix: str="<iocage>"
 ) -> ZFS:
     """Get an instance of iocages enhanced ZFS class."""
-    zfs = ZFS(history=history, history_prefix=history_prefix)
+    zfs = ZFS(
+        history=history,
+        history_prefix=history_prefix,
+        mnttab_cache=False
+    )
     zfs.logger = libioc.helpers_object.init_logger(zfs, logger)
     return zfs