Use stringData in the examples

resolves #2714

Author: meeech

docs/analysis/datadog.md

@@ -40,10 +40,10 @@ kind: Secret
 metadata:
   name: datadog
 type: Opaque
-data:
+stringData:
   address: https://api.datadoghq.com
   api-key: <datadog-api-key>
   app-key: <datadog-app-key>
 ```
 
-`apiVersion` here is different from the `apiVersion` from the Datadog configuration above.
+`apiVersion` here is different from the `apiVersion` from the Datadog configuration above.

docs/analysis/influxdb.md

@@ -34,7 +34,7 @@ kind: Secret
 metadata:
   name: influxdb
 type: Opaque
-data:
+stringData:
   address: <infuxdb-url>
   authToken: <influxdb-auth-token>
   org: <influxdb-org>

docs/analysis/newrelic.md

@@ -33,7 +33,7 @@ kind: Secret
 metadata:
   name: newrelic
 type: Opaque
-data:
+stringData:
   personal-api-key: <newrelic-personal-api-key>
   account-id: <newrelic-account-id>
   region: "us" # optional, defaults to "us" if not set. Only set to "eu" if you use EU New Relic
@@ -47,7 +47,7 @@ kind: Secret
 metadata:
   name: newrelic
 type: Opaque
-data:
+stringData:
   personal-api-key: <newrelic-personal-api-key>
   account-id: <newrelic-account-id>
   region: "us" # optional, defaults to "us" if not set. Only set to "eu" if you use EU New Relic

docs/analysis/wavefront.md

@@ -35,7 +35,7 @@ kind: Secret
 metadata:
   name: wavefront-api-tokens
 type: Opaque
-data:
+stringData:
   example1.wavefront.com: <token1>
   example2.wavefront.com: <token2>
 ```