Update pom.xml

[Muhib007dev]

What this PR does / why we need it: This PR will fix the issue of "Cannot find symbol" that is being faced by user during "build JSS7 from source".

Which issue(s) this PR fixes:fixes #327

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged). Please delete these comments and mark N/A if non-applicable.

Fixes #327

Special notes for your reviewer:I tried and tested this new fix and it is working absolutely fine.