Signed robot applet with a "Dojo Foundation" public key to make Java 7u40 happy. Fix accidental nondeterminism when testing on slower machines. Refs #17442.

(cherry picked from commit 9e1dc62201b7cd06f1c052bae663882003cd3957)
Updating metadata for 1.9.2
Updating source version to 1.9.3-pre