Separate Test Command Line Arguments from Runner Arguments

When passing parameters to test runners based on Boost.Test we need
to distinguish the parameters that are intended for the test case
and those that are intended for the Boost.Test framework (e.g.,
"--run_test=").

ExtraTests.cmake

@@ -18,13 +18,13 @@ set(_testdir ${PROJECT_SOURCE_DIR}/tests/parser/data)
 opm_add_test(ParserTests
              SOURCES tests/parser/ParserTests.cpp
              LIBRARIES ${TEST_LIBS}
-             TEST_ARGS ${_testdir}/)
+             TEST_ARGS -- ${_testdir}/)
 list(APPEND EXTRA_TESTS ParserTests)
 
 opm_add_test(ParserIncludeTests
              SOURCES tests/parser/ParserIncludeTests.cpp
              LIBRARIES ${TEST_LIBS}
-             TEST_ARGS ${_testdir}/parser/)
+             TEST_ARGS -- ${_testdir}/parser/)
 target_compile_definitions(ParserIncludeTests PRIVATE
                            -DHAVE_CASE_SENSITIVE_FILESYSTEM=${HAVE_CASE_SENSITIVE_FILESYSTEM})
 list(APPEND EXTRA_TESTS ParserIncludeTests)
@@ -32,13 +32,13 @@ list(APPEND EXTRA_TESTS ParserIncludeTests)
 opm_add_test(PvtxTableTests
              SOURCES tests/parser/PvtxTableTests.cpp
              LIBRARIES ${TEST_LIBS}
-             TEST_ARGS ${_testdir}/integration_tests/)
+             TEST_ARGS -- ${_testdir}/integration_tests/)
 list(APPEND EXTRA_TESTS PvtxTableTests)
 
 opm_add_test(EclipseStateTests
              SOURCES tests/parser/EclipseStateTests.cpp
              LIBRARIES ${TEST_LIBS}
-             TEST_ARGS ${_testdir}/integration_tests/)
+             TEST_ARGS -- ${_testdir}/integration_tests/)
 list(APPEND EXTRA_TESTS EclipseStateTests)
 
 foreach (test BoxTest
@@ -55,7 +55,7 @@ foreach (test BoxTest
   opm_add_test(${test}
                SOURCES tests/parser/integration/${test}.cpp
                LIBRARIES ${TEST_LIBS}
-               TEST_ARGS ${_testdir}/integration_tests/)
+               TEST_ARGS -- ${_testdir}/integration_tests/)
   list(APPEND EXTRA_TESTS ${test})
 endforeach ()