cli: Add a command line flag to specify datastore

GCC doesn't like multiline raw string literals in macros, so I head to
get rid of the macro.

Change-Id: I1fe2c2f45f2b5700e682c229fdd182edc20e4d77
diff --git a/src/sysrepo_access.hpp b/src/sysrepo_access.hpp
index da5fb75..1d72525 100644
--- a/src/sysrepo_access.hpp
+++ b/src/sysrepo_access.hpp
@@ -27,7 +27,7 @@
 class SysrepoAccess : public DatastoreAccess {
 public:
     ~SysrepoAccess() override;
-    SysrepoAccess(const std::string& appname);
+    SysrepoAccess(const std::string& appname, const Datastore datastore);
     Tree getItems(const std::string& path) override;
     void setLeaf(const std::string& path, leaf_data_ value) override;
     void createPresenceContainer(const std::string& path) override;