remove rollbar and add move to Elastic APM

[bluenevus]

remove rollbar and add move to Elastic APM
-all settings to setup log forwarding must be configurable under the admin menu ie token and url

Install the APM agent
Add the agent to your Gemfile.

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gem 'elastic-apm'
Step 5Configure the agent
APM is automatically started when your app boots. Configure the agent, by creating the config file config/elastic_apm.yml

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config/elastic_apm.yml:

Set service name - allowed characters: a-z, A-Z, 0-9, -, _ and space

Defaults to the name of your Rails app

service_name: 'my-service'

Use if APM Server requires a token

secret_token: ''

Set custom APM Server URL (default: http://localhost:8200)

server_url: 'http://localhost:8200'

See the documentation for configuration options and advanced usage.