Revert "tests add to namespace sls (#464)" (#465)

This reverts commit f5745fcf18.

slsSupportLib/tests/test-ZmqSocket.cpp

@@ -3,9 +3,6 @@
 #include "catch.hpp"
 #include "sls/ZmqSocket.h"
 
-namespace sls {
-
-
 TEST_CASE("Throws when cannot create socket") {
     REQUIRE_THROWS(ZmqSocket("sdiasodjajpvv", 5076001));
 }
@@ -116,6 +113,4 @@ TEST_CASE("Send header and data") {
     for (size_t i = 0; i != data.size(); ++i) {
         REQUIRE(data[i] == received_data[i]);
     }
-}
-
-} //namespace
+}