Change-Id: I184aabfbbd9fcd0b87080d044b0d286f0deac14c
Partially-Implements: blueprint pre-pull-images

By using

    ./tools/build.py --save-dependency a.dot

to gen the Graphviz dot dependency file. Later, you can use the `dot`
to draw the picture.

    dot -Tjpg -o a.jpg a.dot

Implements: blueprint images-dependency-tree
Depends-On: I8e07a1b69fab5f1c587470bfd2104aaba93f0050
Change-Id: If00f4f3fb9d0b10a07ab2abb7ffb1cd9d64902f2

It appears Trove still depends on MySQL-python.
Restore the workaround for broken Percona repo.

Closes-Bug: #1531371
Related-Bug: #1526129
Change-Id: I1781fee14e17a6b7cbb2cf8dae639e049698b9e6

Change-Id: Ic20c31efea461f30917a94546db6e261a8b5166f
Partially-Implements: blueprint pre-pull-images

Change-Id: I81b75f51937c0365cfc3b7066d5f418a8bacd7ea
Partially-Implements: blueprint pre-pull-images

Change-Id: I0971ddcff7b688ae0dee7658ab4be7ca3fbbdc28
Partially-Implements: blueprint pre-pull-images

Change-Id: I860af348b126979fa756f89c6fac769c750be85a
Partially-Implements: blueprint pre-pull-images

Change-Id: I9b453545126e9030406c9888a8210b254ebd3637
Partially-Implements: blueprint pre-pull-images

Change-Id: Ia7a0bb934827f37af6091895b95ece95a9e3c874
Partially-Implements: blueprint pre-pull-images

Change-Id: I64aff93368da7580b6cc1369a42be0904a670f98
Partially-Implements: blueprint pre-pull-images

Change-Id: Ib3c71d89f8e20d58d44034a215140a35c6874a2b
Partially-Implements: blueprint pre-pull-images

Change-Id: Iea91c39733d56a9291287a78a44756d8d38ca71d
Partially-Implements: blueprint pre-pull-images

Change-Id: Idce62ce7c1c10c53e8e42091d6c47da4b770c261
Partially-Implements: blueprint pre-pull-images

Change-Id: I094f1d35f60bf566ba7382504a7425f16ae975d8
Partially-Implements: blueprint pre-pull-images

Change-Id: Ib5c22c7416bdc7ce83123b79fa7b08afda7595bc
Partially-Implements: blueprint pre-pull-images

Change-Id: Ia2e6e3c8371f7b26fb0c77989482d241567e52d1
Partially-Implements: blueprint pre-pull-images

TrivialFix

Change-Id: Ifded72fbe34892e66fea95f31ebf27429f2d10f1

Closes-Bug: #1530122
Change-Id: I96039eade2aacf1bcd9d14d958cdddd915fc9a5c

Do not truncate the error messages of build failure images.

TrivialFix
Change-Id: I4f2da78c57c8d919beba84a10357312bfc66e88c
Closes-Bug: #1531152