Tinkerpop module delays a full build

[GCHQDeveloper314]

Describe the bug
When running a full build of Gaffer the configuration for the tinkerpop Maven module causes a forked build of all the dependencies of this module to be built, even though they have already been built prior. This is caused by the assembly plugin using the wrong goal, it should use the single goal.

To Reproduce
Steps to reproduce the behavior:

1. Run mvn clean install -Pquick
2. The build will take a long time on the tinkerpop module and "forking" messages will be seen for other modules being rebuilt.

Expected behavior
The tinkerpop module should not take significantly longer than the other modules and there should be no forking.

Additional context
The default maven-assembly-plugin version is used, which is old and so this should also be upgraded.