Rework CryptoUtils

CryptoUtils now takes the key from a file located in the resource not 
in spring file

Change-Id: I002978d292550e6173efb4324cbb977f35d7e753
Issue-ID: CLAMP-74
Signed-off-by: Determe, Sebastien (sd378r) <sd378r@intl.att.com>
diff --git a/src/test/resources/clds/key.properties b/src/test/resources/clds/key.properties
new file mode 100644
index 0000000..dda8110
--- /dev/null
+++ b/src/test/resources/clds/key.properties
@@ -0,0 +1 @@
+org.onap.clamp.encryption.aes.key=aa3871669d893c7fb8abbcda31b88b4f
\ No newline at end of file