fix(panic): Fix Java config panic

[daffinito]

Issue

panic: runtime error: index out of range [3] with length 2

goroutine 20 [running]:
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.insertChildKey ({{0x8231b4, 0x1}, {0xc00013e780, 0x35}, {0x0, 0x0}, {0xc0001eb770, 0x1, 0x1}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:474 +0x75f
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.insertChildKey ({{0xc000267e00, 0x16}, {0xc0000c1460, 0x1e}, {0x0, 0x0}, {0xc0001eb7c0, 0x1, 0x1}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:464 +0xb51
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.insertChildKey ({{0xc000267dd0, 0x12}, {0xc000312490, 0xb}, {0x0, 0x0}, {0xc0003b66c0, 0x3, 0x4}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:464 +0xb51
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.insertChildKey ({{0xc000312350, 0xa}, {0x0, 0x0}, {0x0, 0x0}, {0xc0003b1b00, 0x18, 0x20}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:464 +0xb51
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.InsertKey ({{0xc000312350, 0xa}, {0x0, 0x0}, {0x0, 0x0}, {0xc0003b1b00, 0x18, 0x20}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:432 +0x51d
http://github.com/newrelic/newrelic-diagnostics-cli/tasks.ValidateBlob.UpdateOrInsertKey ({{0xc000312350, 0xa}, {0x0, 0x0}, {0x0, 0x0}, {0xc0003b1b00, 0x18, 0x20}}, {0xc000496af8, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/taskHelpers.go:510 +0xae8
http://github.com/newrelic/newrelic-diagnostics-cli/tasks/java/config.updateSysValues ({{0x4a36, {0xc0000b1a2b, 0x4}, {0x0, 0x0}, 0x0, {{0x0, 0x0}, 0x0, 0x0, ...}, ...}, ...}, ...)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/java/config/validate.go:277 +0x765
http://github.com/newrelic/newrelic-diagnostics-cli/tasks/java/config.JavaConfigValidate.Execute ({}, {0x414025?}, 0xc000046800?)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/tasks/java/config/validate.go:112 +0xbe5
main.processTasks({0xc00014ecf0?}, {0x0, 0x0, 0x0?}, 0xc0000b12b0?)
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/processTasks.go:121 +0xa14
created by main.main
/home/runner/work/newrelic-diagnostics-cli/newrelic-diagnostics-cli/core.go:128 +0xa0a

Goals

Resolve panic

Implementation Details

Added a test to test for the panic, added safety clauses to prevent panics

How to Test

./scripts/test.sh

[bradleyisbon]

lgtm!