prserv/cooker: Handle PRService errors cleanly

Current if the PR Service fails to start, bitbake carries on regardless or
hangs with no error message. This adds an exception and then handles it correctly
so the UIs correctly handle the error and exit cleanly.

[YOCTO #4010]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
data_smart.py: add some internal bitbake variables to configuration hash

Take __BBTASKS, __BBHANDLERS and __BBANONFUNCS into account when
computing the configuration hash.

[YOCTO #4447]

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
bitbake: remove stack trace depth limitation

In case of an error in bitbake, the stack trace is limited to 5
items. This is an endless source of confusion and it makes bugs
reports impractical, since a full stack trace can't be included
in the bug report. This patch simply removes the depth limit.

Signed-off-by: Bogdan Marinescu <bogdan.a.marinescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
fetch2/svn: Do not save authentication

Signed-off-by: Simon Vanveerdeghem <simon.vanveerdeghem@barco.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>