Update dependency commons-validator:commons-validator to v1.8.0

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
commons-validator:commons-validator (source)	compile	minor	1.4.0 -> 1.8.0

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	7.3	CVE-2014-0114	#8
High	7.3	CVE-2019-10086	#150

---

• [ ] If you want to rebase/retry this PR, check this box