ERM-2981 Standardise use of external url validator library across ERM… #740

All 247 tests pass in 3m 26s

    1 files ±  0   35 suites +13 3m 26s ⏱️ + 1m 12s
247 tests +89 247 ✔️ +89 0 💤 ±0 0 ❌ ±0
254 runs +90 254 ✔️ +90 0 💤 ±0 0 ❌ ±0

Results for commit 2fdf27c. ± Comparison against earlier commit 4fa905b.