move more tests to gradle junit5 tests

.gitignore

build.gradle

src/test/jastadd/Utils.jadd

src/test/jastadd/lowerbounds/LowerBounds.relast

src/test/jastadd/relations/Relations.relast

src/test/jastadd/relations/Relations2.ast

src/test/jastadd/relations/Relations2.jadd

src/test/java/org/jastadd/relast/tests/AnalysisTests.java

src/test/java/org/jastadd/relast/tests/Errors.java

src/test/java/org/jastadd/relast/tests/LowerBounds.java

src/test/java/org/jastadd/relast/tests/Relations.java

src/test/java/org/jastadd/relast/tests/TestHelpers.java

...st/java/org/jastadd/relast/tests/testsuite/TestSuite.java

tests/multipleFiles/.gitignore

tests/multipleFiles/All.ast

tests/multipleFiles/All.jadd

tests/multipleFiles/Makefile

tests/resolverHelper/.gitignore

tests/resolverHelper/All.ast

tests/resolverHelper/All.jadd