Fixing Bug 1376

This fix will check the port existence before deleting the port.
It will solve the error "Error deleting port: PortNotFoundClient".

Change-Id: I2b0b841c6111578e0d1a0cde9057eb3ab0b5a86a
Signed-off-by: aticig <gulsum.atici@canonical.com>
2 files changed