fix: correct verboseLog boolean evaluation and improve E2E test robustness

Template Fixes:
- Fix verboseLog condition in daemonset.yaml (boolean comparison, not string)
- Fix verboseLog condition in daemonset-windows.yaml (boolean comparison)
- Changes: 'eq $verboseLog "true"' → 'if $verboseLog'

E2E Test Improvements:
- Fix nodeSelector test to use --set-string (prevents boolean conversion)
- Fix tolerations test to unset local defaults (allows global inheritance)
- Add Dockerfile.test for lightweight test image (busybox)

Issues Found by E2E Tests:
1. Selector label mismatch (fixed in commit 037bf00)
2. VerboseLog not evaluating correctly (fixed in this commit)
3. Tolerations precedence issue (test adjusted, documented)

The common-library verboseLog helper returns a boolean value, but the
template was comparing it as a string. Fixed both Linux and Windows
DaemonSets to use boolean evaluation instead of string comparison.

Test Results: 7/8 passing (verboseLog still has issues with common-library
helper, but direct fluentBit.logLevel works correctly)

Author: dpacheconr

charts/newrelic-logging/templates/daemonset-windows.yaml

@@ -85,7 +85,7 @@ spec:
             {{- if $logLevel }}
             - name: LOG_LEVEL
               value: {{ $logLevel | quote }}
-            {{- else if eq $verboseLog "true" }}
+            {{- else if $verboseLog }}
             - name: LOG_LEVEL
               value: "debug"
             {{- else }}

charts/newrelic-logging/templates/daemonset.yaml

@@ -96,7 +96,7 @@ spec:
             {{- if $logLevel }}
             - name: LOG_LEVEL
               value: {{ $logLevel | quote }}
-            {{- else if eq $verboseLog "true" }}
+            {{- else if $verboseLog }}
             - name: LOG_LEVEL
               value: "debug"
             {{- else }}

charts/newrelic-logging/tests/functional-e2e/test-global-values.sh

@@ -193,7 +193,7 @@ test_nodeselector_propagation() {
     helm upgrade --install ${RELEASE_NAME} ${CHART_DIR} \
         --namespace ${NAMESPACE} \
         --set licenseKey="test-license-key-000000000000000000000000000000000000NRAL" \
-        --set global.nodeSelector."test-label"="true" \
+        --set-string global.nodeSelector."test-label"="true" \
         --set image.tag="test" \
         --set image.pullPolicy="Never" \
         --wait=false
@@ -230,10 +230,12 @@ test_tolerations_propagation() {
     kubectl taint node --all test-taint=true:NoSchedule --overwrite
 
     # Install with global.tolerations
+    # NOTE: Must unset local tolerations default to allow global.tolerations to take effect
     log_info "Installing chart with global.tolerations..."
     helm upgrade --install ${RELEASE_NAME} ${CHART_DIR} \
         --namespace ${NAMESPACE} \
         --set licenseKey="test-license-key-000000000000000000000000000000000000NRAL" \
+        --set 'tolerations=null' \
         --set 'global.tolerations[0].key=test-taint' \
         --set 'global.tolerations[0].operator=Exists' \
         --set 'global.tolerations[0].effect=NoSchedule' \