fix gatt client test

git-svn-id: http://btstack.googlecode.com/svn/trunk@2878 1a0a8af8-31b5-11de-8e0c-53a27eea117e
renamed variable

git-svn-id: http://btstack.googlecode.com/svn/trunk@2879 1a0a8af8-31b5-11de-8e0c-53a27eea117e
cast BTstack error

git-svn-id: http://btstack.googlecode.com/svn/trunk@2880 1a0a8af8-31b5-11de-8e0c-53a27eea117e
works with timer

git-svn-id: http://btstack.googlecode.com/svn/trunk@2881 1a0a8af8-31b5-11de-8e0c-53a27eea117e
le central handle connection update params

git-svn-id: http://btstack.googlecode.com/svn/trunk@2882 1a0a8af8-31b5-11de-8e0c-53a27eea117e