feat: added java instrumentation for elasticsearch queries

quickstarts/java/elasticsearch/alerts/HighCpuUtilization.yml

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+---
+name: High CPU Utilization
+
+details: |+
+  This alert is triggered when the CPU Utilization is above 90%.
+
+type: STATIC
+nrql:
+  query: "SELECT rate(sum(apm.service.cpu.usertime.utilization), 1 second) * 100
+    as cpuUsage FROM Metric WHERE appName like '%'"
+
+# Function used to aggregate the NRQL query value(s) for comparison to the terms.threshold (Default: SINGLE_VALUE)
+valueFunction: SINGLE_VALUE
+
+# List of Critical and Warning thresholds for the condition
+terms:
+  - priority: CRITICAL
+    # Operator used to compare against the threshold.
+    operator: ABOVE
+    # Value that triggers a violation
+    threshold: 90
+    # Time in seconds; 120 - 3600
+    thresholdDuration: 300
+    # How many data points must be in violation for the duration
+    thresholdOccurrences: ALL
+
+# Duration after which a violation automatically closes
+# Time in seconds; 300 - 2592000 (Default: 86400 [1 day])
+violationTimeLimitSeconds: 2592000

quickstarts/java/elasticsearch/alerts/TransactionErrors.yml

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+---
+name: Transaction Errors
+
+details: |+
+  This alert is triggered when the the transactions fail more than 10% of the time in 5 minutes.
+
+type: STATIC
+nrql:
+  query:
+    "SELECT count(apm.service.error.count) / count(apm.service.transaction.duration) * 100
+    as 'Web errors' FROM Metric WHERE appName like '%'
+    AND (transactionType = 'Web')"
+
+# Function used to aggregate the NRQL query value(s) for comparison to the terms.threshold (Default: SINGLE_VALUE)
+valueFunction: SINGLE_VALUE
+
+# List of Critical and Warning thresholds for the condition
+terms:
+  - priority: CRITICAL
+    # Operator used to compare against the threshold.
+    operator: ABOVE
+    # Value that triggers a violation
+    threshold: 10
+    # Time in seconds; 120 - 3600
+    thresholdDuration: 300
+    # How many data points must be in violation for the duration
+    thresholdOccurrences: ALL
+
+# Duration after which a violation automatically closes
+# Time in seconds; 300 - 2592000 (Default: 86400 [1 day])
+violationTimeLimitSeconds: 86400

quickstarts/java/elasticsearch/config.yml

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+id: ca1d4f11-5dea-4c8c-8a83-d59fb0b9e52b
+name: gcp-pubsub
+title: Google Cloud Pub/Sub Java Agent Extension
+description: |
+  # What is Pub/Sub?
+
+  Messaging and ingestion for event-driven systems and streaming analytics. 
+    - Pub/Sub enables you to create systems of event producers and consumers, called publishers and subscribers.
+    - Publishers communicate with subscribers asynchronously by broadcasting events, rather than by synchronous remote procedure calls (RPCs).
+    - Publishers send events to the Pub/Sub service, without regard to how or when these events will be processed. 
+    Pub/Sub then delivers events to all services that need to react to them. 
+    Compared to systems communicating through RPCs, where publishers must wait for subscribers to receive the data,
+    such asynchronous integration increases the flexibility and robustness of the system overall.
+
+summary: |
+  Java agent extension to monitor Google Cloud Pub/Sub with New Relic. Once installed, the instrumentation will monitor both the publish and the subscribe of messages sent via the PubSub framework.
+  In addition, the instrumentation will take care of distributed tracing so that the publish will provide the distributed tracing headers on the message and the subscribe will read the headers and process them appropriately.
+
+icon: icon.svg
+logo: logo.svg
+level: Community
+website: https://cloud.google.com/pubsub 
+
+keywords:
+  - nrlabs
+  - nrlabs-data
+  - apm
+  - java
+  - pubsub
+  - gcp
+
+authors:
+  - New Relic Labs
+
+documentation:
+  - name: Java agent extension for Google Cloud Pub/Sub
+    description: |
+      Java Agent instrumentation extension for the Google Cloud Platform PubSub framework 
+    url: >-
+      https://github.com/newrelic-experimental/newrelic-java-gcp-pubsub