Many tests try to check matchedVertex incorrectly

[t92549]

Describe the bug
There are tests in Gaffer where an assertion is made that a results Edge is the same as an expected Edge, and the matchedVertex has an expected result, e.g.:

Gaffer/integration-test/src/test/java/uk/gov/gchq/gaffer/integration/impl/GeneratorsIT.java

Lines 104 to 110 in 1ef3621

	final Edge expectedEdge = new Edge.Builder()
	.group(TestGroups.EDGE)
	.source(NEW_SOURCE)
	.dest(NEW_DEST)
	.directed(false)
	.matchedVertex(EdgeId.MatchedVertex.DESTINATION)
	.build();

However, they are just relying on the Edge.equals method which explicitly ignores matchedVertex:

Gaffer/core/data/src/main/java/uk/gov/gchq/gaffer/data/element/Edge.java

Lines 322 to 329 in 1ef3621

	* Note this does not include the matchedVertex field.
	*
	* @param obj the reference object with which to compare.
	* @return {@code true} if this object is the same as the obj
	* argument; {@code false} otherwise.
	*/
	@Override
	public boolean equals(final Object obj) {

These tests should be fixed to properly check matchedVertex is as expected, e.g.:

Gaffer/core/data/src/test/java/uk/gov/gchq/gaffer/data/element/EdgeTest.java

Line 72 in 1ef3621

assertEquals("source vertex", edge.getMatchedVertexValue());

Or, perhaps a custom condition should be made, similar to:

Gaffer/store-implementation/accumulo-store/src/test/java/uk/gov/gchq/gaffer/accumulostore/integration/AccumuloMatchedVertexIT.java

Lines 87 to 88 in 1ef3621

	Condition<Edge> matchedVertex = new Condition<>(
	edge -> null != edge.getMatchedVertex(), "matched vertex");