Rename `InvalidDatabaseAdapter` to `UnsupportedDatabaseAdapter`

Tried this out with MySQL, and got this error since I haven't integrated
it yet. It struck me that "Invalid" doesn't make any sense. Really it's
something that is possible to do but that our gem doesn't support, so we
should be clearer about that fact.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/dbshell/client/database.rb b/lib/dbshell/client/database.rb
index 08fd8fe..86cbfef 100644
--- a/lib/dbshell/client/database.rb
+++ b/lib/dbshell/client/database.rb
@@ -11,7 +11,7 @@ module DBShell
         when 'postgresql'
           DBShell::Client::Postgres
         else
-          raise InvalidDatabaseAdapter
+          raise UnsupportedDatabaseAdapter
         end
       end
 
@@ -23,6 +23,6 @@ module DBShell
     end
 
 
-    class InvalidDatabaseAdapter < StandardError; end
+    class UnsupportedDatabaseAdapter < StandardError; end
   end
 end