Create init method on provider interface

vendor/github.com/Microsoft/ApplicationInsights-Go/appinsights/configuration.go

@@ -0,0 +1,19 @@
+package appinsights
+
+import "time"
+
+type TelemetryConfiguration struct {
+	InstrumentationKey string
+	EndpointUrl        string
+	MaxBatchSize       int
+	MaxBatchInterval   time.Duration
+}
+
+func NewTelemetryConfiguration(instrumentationKey string) *TelemetryConfiguration {
+	return &TelemetryConfiguration{
+		InstrumentationKey: instrumentationKey,
+		EndpointUrl:        "https://dc.services.visualstudio.com/v2/track",
+		MaxBatchSize:       1024,
+		MaxBatchInterval:   time.Duration(10) * time.Second,
+	}
+}