artifactory: Updates to Artifactory Pro & MySQL Connector/J
artifactory: Updates to Artifactory Pro & MySQL Connector/J

Artifactory Pro: 6.5.2 (coded into Dockerfile)
MySQL Connector/J 5.1.47 (default via ARG in Dockerfile)

Rebuilding also means we get the latest JDK (8.181 a the time of this
build).

Change-Id: Iee2fd334e882de5226d465f5c9cd24331ad1b2dd

att-comdev/dockerfiles,att-comdev/dockerfiles