Use Bats work dir by default

[AirQuick]

Fixes #583

The current Bats script creates XSpec output directories here and there inside the repository, and deletes them later. That doesn't scale.
This pull request directs XSpec CLI and Ant to use a common work directory outside the repository.

Current master

xspec/test/xspec.bats

Lines 20 to 36 in 5c90152

	setup() {
	work_dir="${BATS_TMPDIR}/xspec/bats_work"
	mkdir -p "${work_dir}"
	mkdir ../test/catalog/xspec
	mkdir ../test/xspec
	mkdir ../tutorial/schematron/xspec
	mkdir ../tutorial/xspec
	}
	teardown() {
	rm -rf "${work_dir}"
	rm -rf ../test/catalog/xspec
	rm -rf ../test/xspec
	rm -rf ../tutorial/schematron/xspec
	rm -rf ../tutorial/xspec
	}

This pull request

xspec/test/xspec.bats

Lines 24 to 34 in f9eac48

	setup() {
	work_dir="${BATS_TMPDIR}/xspec/bats_work"
	mkdir -p "${work_dir}"
	export TEST_DIR="${work_dir}/output_${RANDOM}"
	export ANT_ARGS="-Dxspec.dir=${TEST_DIR}"
	}
	teardown() {
	rm -r "${work_dir}"
	}

Also

• Some other adjustments are made throughout the Bats script.
• Some test cases are added.

Further work

Remove If you earlier ran tests manually without removing the temporary... from Wiki.

[AirQuick]

Merging this, because we know from experience that leaving this kind of pull request pending will result in unmanageable conflicts.

[AirQuick]

@xspec/xspec

Further work

Remove If you earlier ran tests manually without removing the temporary... from Wiki.

Done