recipetool: Load plugins in a well defined order

To allow recipetool plugins in one layer to shadow another in a well
defined way, first search BBPATH/lib/recipetool directories and then
scripts/lib/recipetool and load only the first found.

The previous search and load loop would load all found plugins with the
ones found later replacing any found before.

(From OE-Core rev: 7a8726a3662a3909dc6ef6e8d1029d0b1aa938c3)

Signed-off-by: Ola x Nilsson <ola.x.nilsson@axis.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/recipetool

@@ -78,8 +78,8 @@ def main():
 
     tinfoil = tinfoil_init(False)
     try:
-        for path in ([scripts_path] +
-                    tinfoil.config_data.getVar('BBPATH', True).split(':')):
+        for path in (tinfoil.config_data.getVar('BBPATH', True).split(':')
+                     + [scripts_path]):
             pluginpath = os.path.join(path, 'lib', 'recipetool')
             scriptutils.load_plugins(logger, plugins, pluginpath)