Rename "memory" directory to "probe_behavior"

The behavior alteration we are testing here is not exactly connected to
memory. I'd rather name it like probe_behavior to make the folder a
collection of tests related to these env. vars.

Author: jan-cerny

tests/CMakeLists.txt

@@ -30,10 +30,10 @@ add_subdirectory("curl")
 add_subdirectory("CPE")
 add_subdirectory("DS")
 add_subdirectory("mitre")
-add_subdirectory("memory")
 add_subdirectory("nist")
 add_subdirectory("oscap_string")
 add_subdirectory("oval_details")
+add_subdirectory("probe_behavior")
 add_subdirectory("probes")
 add_subdirectory("report")
 add_subdirectory("sce")