tests: Move common to separate module to avoid endless test file

... which is no longer basic after having 2000+ lines

Signed-off-by: Jakub Jelen <jjelen@redhat.com>

Author: Jakuje

cryptoki/tests/common.rs renamed to cryptoki/tests/common/mod.rs

@@ -16,6 +16,7 @@ fn get_pkcs11_path() -> String {
         .unwrap_or_else(|_| "/usr/local/lib/softhsm/libsofthsm2.so".to_string())
 }
 
+#[allow(dead_code)]
 pub fn is_softhsm() -> bool {
     get_pkcs11_path().contains("softhsm")
 }