fix #1486: add wraps() decorator around wrap_exceptions

HISTORY.rst

@@ -35,6 +35,8 @@
   APIs. Different process methods were affected by this.
 - 1480_: [Windows] psutil.cpu_count(logical=False) could cause a crash due to
   fixed read violation.  (patch by Samer Masterson)
+- 1486_: [AIX, SunOS] AttributeError when interacting with Process methods
+  involved into oneshot() context.
 
 5.6.1
 =====

psutil/_psaix.py

@@ -7,6 +7,7 @@
 """AIX platform implementation."""
 
 import errno
+import functools
 import glob
 import os
 import re
@@ -322,7 +323,7 @@ def wrap_exceptions(fun):
     """Call callable into a try/except clause and translate ENOENT,
     EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
     """
-
+    @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)

psutil/_pssunos.py

@@ -5,6 +5,7 @@
 """Sun OS Solaris platform implementation."""
 
 import errno
+import functools
 import os
 import socket
 import subprocess
@@ -336,7 +337,7 @@ def wrap_exceptions(fun):
     """Call callable into a try/except clause and translate ENOENT,
     EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
     """
-
+    @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)