[IOT-2005] Correct PEM encoding of test certs in SSL tests

[IOT-2005] Correct PEM encoding of test certs in SSL tests

mbedTLS insists on newlines in PEM data, and the lack thereof is
causing SSL adapter tests to fail. Add newlines to the test certs
for correct parsing.

Change-Id: I5c42dbd648bf111ac00f746d4e59fc4a9a224208
Signed-off-by: Kevin Kane <kkane@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18575
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Alex Kelley <alexke@microsoft.com>
Reviewed-by: Way Vadhanasin <wayvad@microsoft.com>
Reviewed-by: Greg Zaverucha <gregz@microsoft.com>