Ignore *.service files when linting bash scripts

Prevents this bashate warning:

./elements/manila-ssh/install.d/fetch-public-ssh-keys.service:1:1: E005 File does not begin with #! or have .sh prefix

TrivialFix

Change-Id: I9e4e6b96730ddc62ac1094ec4af0c84863acc60f
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>

tools/run_bashate.sh

@@ -4,5 +4,5 @@ find ./ -not -wholename \*.tox/\* -and \
     \( -name \*.sh -or -wholename \*.d/\* -and \
     -not -name \*.md -and -not -name \*.rst -and \
     -not -name \*.py  -and -not -name \*.conf \) \
-    -not -name \*.yaml \
+    -not -name \*.service -not -name \*.yaml \
     -print0 | xargs -0 bashate -v -i E006