PR fixes; remove all infura token references and setup travis to use encrypted env

variable; rest of the ethjson_rpc dependent tests extracted to integration_test

pkg/contract_watcher/shared/repository/event_repository.go

@@ -97,7 +97,7 @@ func (r *eventRepository) persistLogs(logs []types.Log, eventInfo types.Event, c
 
 // Creates a custom postgres command to persist logs for the given event (compatible with light synced vDB)
 func (r *eventRepository) persistLightSyncLogs(logs []types.Log, eventInfo types.Event, contractAddr, contractName string) error {
-	tx, err := r.db.Begin()
+	tx, err := r.db.Beginx()
 	if err != nil {
 		return err
 	}
@@ -151,7 +151,7 @@ func (r *eventRepository) persistLightSyncLogs(logs []types.Log, eventInfo types
 
 // Creates a custom postgres command to persist logs for the given event (compatible with fully synced vDB)
 func (r *eventRepository) persistFullSyncLogs(logs []types.Log, eventInfo types.Event, contractAddr, contractName string) error {
-	tx, err := r.db.Begin()
+	tx, err := r.db.Beginx()
 	if err != nil {
 		return err
 	}

pkg/contract_watcher/shared/repository/method_repository.go

@@ -77,7 +77,7 @@ func (r *methodRepository) PersistResults(results []types.Result, methodInfo typ
 
 // Creates a custom postgres command to persist logs for the given event
 func (r *methodRepository) persistResults(results []types.Result, methodInfo types.Method, contractAddr, contractName string) error {
-	tx, err := r.DB.Begin()
+	tx, err := r.DB.Beginx()
 	if err != nil {
 		return err
 	}