exception: switch to public sdbus exception

SdBusError was intended to be a private error type inside sdbusplus.
Switch all catch locations to use the general sdbusplus::exception type.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I03198711b6d148e82106ca6ff809c25d814ad201
diff --git a/utils.hpp b/utils.hpp
index b1da8c0..5e49f83 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -47,7 +47,7 @@
  *
  *  @return The value of the property(type: variant)
  *
- *  @throw sdbusplus::exception::SdBusError when it fails
+ *  @throw sdbusplus::exception::exception when it fails
  */
 const PropertyValue getProperty(const std::string& objectPath,
                                 const std::string& interface,