Add tests for the ssl_context_info program

Signed-off-by: Piotr Nowicki <piotr.nowicki@arm.com>
diff --git a/tests/data_files/base64/srv_def.txt b/tests/data_files/base64/srv_def.txt
new file mode 100644
index 0000000..ca81461
--- /dev/null
+++ b/tests/data_files/base64/srv_def.txt
@@ -0,0 +1,2 @@
+// Server context with default MbedTLS configuration
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