RFR: 8190985: .jcheck/conf files contain 'project=jdk10'

[Tim Bell]

This is a minor fix that will correct an oversight in .jcheck/conf:
http://cr.openjdk.java.net/~tbell/8190985/webrev/

This affects where jcheck looks in the census when checking committers.

Here is the diff:

% hg diff
diff --git a/.jcheck/conf b/.jcheck/conf
--- a/.jcheck/conf
+++ b/.jcheck/conf
@@ -1,2 +1,2 @@
-project=jdk10
+project=jdk
 bugids=dup

Testing:  We ran "hg jcheck -vv -r 0..tip" which iterates over all 
changesets in the history for jdk/jdk.  All good.

Tim