* Fix for Go 1.10

In Go 1.10  returns: certificate specifies an incompatible key usage: asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 1} for APNS cert. This code change will catch and ignore this error.

* update expired cert for test

* remove .idea files

* add golang 1.10 to travis test