replace deprecated pyparsing method
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 <23768c94a9ff9c3948f2b1373d75b7bec9121063@gmail.com>

openstack/manila,openstack/manila