Add pylint py3 portability checks for the nova-api-proxy

A lot of work has gone into making sure that StarlingX is python3
compatible. To ensure future compatibility, enable the python3
portability checks. Disable the checks that are raising errors.
Another set of commits will address the offending code.

Add following suppress warnings in pylint.rc:
- W1618: no-absolute-import
- W1645: exception-message-attribute

Story: 2006796
Task: 43274

Signed-off-by: Fabricio Henrique Ramos <fabriciohenrique.ramos@windriver.com>
Change-Id: Icf304783ecfc98f3493f74faef6f2638c331dc5f

nova-api-proxy/pylint.rc

@@ -20,7 +20,87 @@ load-plugins=
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option
 # multiple time.
-#enable=
+#
+# Python3 checker:
+#
+# E1601: print-statement
+# E1602: parameter-unpacking
+# E1603: unpacking-in-except
+# E1604: old-raise-syntax
+# E1605: backtick
+# E1606: long-suffix
+# E1607: old-ne-operator
+# E1608: old-octal-literal
+# E1609: import-star-module-level
+# E1610: non-ascii-bytes-literal
+# E1611: invalid-unicode-literal
+# W1601: apply-builtin
+# W1602: basestring-builtin
+# W1603: buffer-builtin
+# W1604: cmp-builtin
+# W1605: coerce-builtin
+# W1606: execfile-builtin
+# W1607: file-builtin
+# W1608: long-builtin
+# W1609: raw_input-builtin
+# W1610: reduce-builtin
+# W1611: standarderror-builtin
+# W1612: unicode-builtin
+# W1613: xrange-builtin
+# W1614: coerce-method
+# W1615: delslice-method
+# W1616: getslice-method
+# W1617: setslice-method
+# W1618: no-absolute-import
+# W1619: old-division
+# W1620: dict-iter-method
+# W1621: dict-view-method
+# W1622: next-method-called
+# W1623: metaclass-assignment
+# W1624: indexing-exception
+# W1625: raising-string
+# W1626: reload-builtin
+# W1627: oct-method
+# W1628: hex-method
+# W1629: nonzero-method
+# W1630: cmp-method
+# W1632: input-builtin
+# W1633: round-builtin
+# W1634: intern-builtin
+# W1635: unichr-builtin
+# W1636: map-builtin-not-iterating
+# W1637: zip-builtin-not-iterating
+# W1638: range-builtin-not-iterating
+# W1639: filter-builtin-not-iterating
+# W1640: using-cmp-argument
+# W1641: eq-without-hash
+# W1642: div-method
+# W1643: idiv-method
+# W1644: rdiv-method
+# W1645: exception-message-attribute
+# W1646: invalid-str-codec
+# W1647: sys-max-int
+# W1648: bad-python3-import
+# W1649: deprecated-string-function
+# W1650: deprecated-str-translate-call
+# W1651: deprecated-itertools-function
+# W1652: deprecated-types-field
+# W1653: next-method-defined
+# W1654: dict-items-not-iterating
+# W1655: dict-keys-not-iterating
+# W1656: dict-values-not-iterating
+# W1657: deprecated-operator-function
+# W1658: deprecated-urllib-function
+# W1659: xreadlines-attribute
+# W1660: deprecated-sys-function
+# W1661: exception-escape
+# W1662: comprehension-escape
+enable=E1603,E1609,E1610,E1602,E1606,E1608,E1607,E1605,E1604,E1601,E1611,W1652,
+       W1651,W1649,W1657,W1660,W1658,W1659,W1623,W1622,W1620,W1621,W1645,W1641,
+       W1624,W1648,W1625,W1611,W1662,W1661,W1650,W1640,W1630,W1614,W1615,W1642,
+       W1616,W1628,W1643,W1629,W1627,W1644,W1617,W1601,W1602,W1603,W1604,W1605,
+       W1654,W1655,W1656,W1619,W1606,W1607,W1639,W1618,W1632,W1634,W1608,W1636,
+       W1653,W1646,W1638,W1609,W1610,W1626,W1633,W1647,W1635,W1612,W1613,W1637
 
 # Disable the message, report, category or checker with the given id(s). You
 # can either give multiple identifier separated by comma (,) or put this option
@@ -34,7 +114,11 @@ load-plugins=
 # W0613 Unused argument warning
 # W0621 Redefining name %r from outer scope
 # W0703 broad except warning
-disable=C, R, E1101, E1121, W0404, W0601, W0603, W0613, W0621, W0703
+# Disable Python3 checkers:
+#  W1618: no-absolute-import
+#  W1645: exception-message-attribute
+disable=C, R, E1101, E1121, W0404, W0601, W0603, W0613, W0621, W0703, W1618,
+        W1645
 
 
 [REPORTS]