Moving diagnostics into a service (#14832)

* Moving diagnostics into a service

* Fixing golint checks

* Fixing tests

* Renaming from diagnostics to telemetry

* Adding missing files

* Initializing telemetry earlier in the server startup

* Fixing tests

* Adding a log for the telemetryID initialization error

* Addressing PR review comments

* Fixing merge problem

* Removing some extra Diagnostics mentions

* Making tests pass

services/telemetry/mocks/ServerIface.go

@@ -0,0 +1,147 @@
+// Code generated by mockery v1.0.0. DO NOT EDIT.
+
+// Regenerate this file using `make telemetry-mocks`.
+
+package mocks
+
+import (
+	httpservice "github.com/mattermost/mattermost-server/v5/services/httpservice"
+	mock "github.com/stretchr/testify/mock"
+
+	model "github.com/mattermost/mattermost-server/v5/model"
+
+	plugin "github.com/mattermost/mattermost-server/v5/plugin"
+)
+
+// ServerIface is an autogenerated mock type for the ServerIface type
+type ServerIface struct {
+	mock.Mock
+}
+
+// Config provides a mock function with given fields:
+func (_m *ServerIface) Config() *model.Config {
+	ret := _m.Called()
+
+	var r0 *model.Config
+	if rf, ok := ret.Get(0).(func() *model.Config); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.Config)
+		}
+	}
+
+	return r0
+}
+
+// GetPluginsEnvironment provides a mock function with given fields:
+func (_m *ServerIface) GetPluginsEnvironment() *plugin.Environment {
+	ret := _m.Called()
+
+	var r0 *plugin.Environment
+	if rf, ok := ret.Get(0).(func() *plugin.Environment); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*plugin.Environment)
+		}
+	}
+
+	return r0
+}
+
+// GetRoleByName provides a mock function with given fields: _a0
+func (_m *ServerIface) GetRoleByName(_a0 string) (*model.Role, *model.AppError) {
+	ret := _m.Called(_a0)
+
+	var r0 *model.Role
+	if rf, ok := ret.Get(0).(func(string) *model.Role); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.Role)
+		}
+	}
+
+	var r1 *model.AppError
+	if rf, ok := ret.Get(1).(func(string) *model.AppError); ok {
+		r1 = rf(_a0)
+	} else {
+		if ret.Get(1) != nil {
+			r1 = ret.Get(1).(*model.AppError)
+		}
+	}
+
+	return r0, r1
+}
+
+// GetSchemes provides a mock function with given fields: _a0, _a1, _a2
+func (_m *ServerIface) GetSchemes(_a0 string, _a1 int, _a2 int) ([]*model.Scheme, *model.AppError) {
+	ret := _m.Called(_a0, _a1, _a2)
+
+	var r0 []*model.Scheme
+	if rf, ok := ret.Get(0).(func(string, int, int) []*model.Scheme); ok {
+		r0 = rf(_a0, _a1, _a2)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*model.Scheme)
+		}
+	}
+
+	var r1 *model.AppError
+	if rf, ok := ret.Get(1).(func(string, int, int) *model.AppError); ok {
+		r1 = rf(_a0, _a1, _a2)
+	} else {
+		if ret.Get(1) != nil {
+			r1 = ret.Get(1).(*model.AppError)
+		}
+	}
+
+	return r0, r1
+}
+
+// HttpService provides a mock function with given fields:
+func (_m *ServerIface) HttpService() httpservice.HTTPService {
+	ret := _m.Called()
+
+	var r0 httpservice.HTTPService
+	if rf, ok := ret.Get(0).(func() httpservice.HTTPService); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(httpservice.HTTPService)
+		}
+	}
+
+	return r0
+}
+
+// IsLeader provides a mock function with given fields:
+func (_m *ServerIface) IsLeader() bool {
+	ret := _m.Called()
+
+	var r0 bool
+	if rf, ok := ret.Get(0).(func() bool); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(bool)
+	}
+
+	return r0
+}
+
+// License provides a mock function with given fields:
+func (_m *ServerIface) License() *model.License {
+	ret := _m.Called()
+
+	var r0 *model.License
+	if rf, ok := ret.Get(0).(func() *model.License); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.License)
+		}
+	}
+
+	return r0
+}