Added default JVM Args in Docker File

Related issue - osdu/platform/deployment-and-operations/infra-azure-provisioning#159 (closed)

Adding default JVM Args to the Docker image along with the support to override the given values.

Screenshots for the fix.

1. Current behavior - the JVM args are not configured
2. Default values - The Search service picked up default values of heap from the Docker image
3. Overriden values - The search service picked up new values that were over written from the environment variables

        - name: JAVA_OPTS
          value: "-XX:InitialRAMPercentage=35.0 -XX:MaxRAMPercentage=70.0"