v1.2.1: Fixing error handling

When a connection is refused by mongo, it should bail out of the read cycle.

v1.2.0: Collection Metrics

Merge pull request #26 from signalfx/collection-metrics

Adding collection level metrics

v1.1.4

• Enhance compatibility with older versions of collectd

v1.1.3

• Add support for tls authentication with mongodb

v1.1.2

• Add support for monitoring multiple instances of mongodb

Add fix for default dimension support

Merge pull request #18 from signalfx/add_more_dim_support

Add complete dimension support

Add default dimension support for plugin_instance

• Add ability to configure dimensions to use for all metrics
• Fix keyerror failure if mongodb v3.4.x