test_sysdb_views: Use unique directory for cache
Two tests stored cache in the same directory, It can cause failures with
parallel execution of tests.
sh$ git grep tests_sysdb
src/tests/cmocka/test_sysdb_views.c:#define TESTS_PATH "tests_sysdb"
src/tests/sysdb-tests.c:#define TESTS_PATH "tests_sysdb"
This patch also clean up potential leftovers after previous failed
test_sysdb_views before execution of test suite.
Reviewed-by: Pavel Březina <pbrezina@redhat.com>