replace deprecated pyparsing method

pyparsing renamed a method used to define the operator
precedence hierarchy [1]. The method's behavior was preserved
although opt-in override enhancements to the paranthesis were
introduced.

Needed-by: https://review.opendev.org/818614/
[1] https://github.com/pyparsing/pyparsing/commit/ab2f220dd26ead73ce5bf496db85c07810e458f4

Change-Id: I77ea03284c1db6b4eb171ef6e2e88ac506304502
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>

manila/scheduler/evaluator/evaluator.py

@@ -235,7 +235,7 @@ def _def_parser():
     nums = pyparsing.nums
     oneOf = pyparsing.oneOf
     opAssoc = pyparsing.opAssoc
-    operatorPrecedence = pyparsing.operatorPrecedence
+    infixNotation = pyparsing.infixNotation
     Word = pyparsing.Word
 
     integer = Word(nums)
@@ -256,7 +256,7 @@ def _def_parser():
     negateop = oneOf('NOT not !')
 
     operand.setParseAction(EvalConstant)
-    expr = operatorPrecedence(operand, [
+    expr = infixNotation(operand, [
         (fn, 1, opAssoc.RIGHT, EvalFunction),
         ("^", 2, opAssoc.RIGHT, EvalPowerOp),
         (signop, 1, opAssoc.RIGHT, EvalSignOp),