[Hactoberfest] Limit the number of retries on concurrency modification exceptions

[heshamMassoud]

Situation
Currently on concurrency modification exceptions the sync retries with no limit until there is no error. See:

commercetools-sync-java/src/main/java/com/commercetools/sync/commons/BaseSync.java

Lines 115 to 124 in 7cacc37

	protected static <S> S executeSupplierIfConcurrentModificationException(
	@Nonnull final Throwable sphereException,
	@Nonnull final Supplier<S> onConcurrentModificationSupplier,
	@Nonnull final Supplier<S> onOtherExceptionSupplier) {
	final Throwable completionExceptionCause = sphereException.getCause();
	if (completionExceptionCause instanceof ConcurrentModificationException) {
	return onConcurrentModificationSupplier.get();
	}
	return onOtherExceptionSupplier.get();
	}

Complication
It causes unnecessary api calls if the platform returns 409 - ConcurrentModificationException for the requests.

Resolution
Limit the number of retries on concurrency modification exceptions.