Revert "[Catapult] Update Jinja version to be python 3 compatible"
Revert "[Catapult] Update Jinja version to be python 3 compatible"

This reverts commit 48e565a558b910acdc6757d141e90f0c7e9b24a7.

Reason for revert: Causing perf dashboard deployment failure, as version 2.7 is not supported by GAE

Original change's description:
> [Catapult] Update Jinja version to be python 3 compatible
>
> Bug: chromium:1221663
> Change-Id: I2657863507e3e45c86d0323d4d937cac8ad90d8d
> Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3071899
> Reviewed-by: John Chen <334fbfbb4df7c78f091ea1b77c69ca6ac731a3f3@chromium.org>
> Commit-Queue: Wenbin Zhang <45ad8a1ff616a38a2202fd35571df81897c5f14f@google.com>

Bug: chromium:1221663
Change-Id: Idc772b07a8f510f53ea8cbd14f85f26b5a654387
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3073439
Auto-Submit: John Chen <334fbfbb4df7c78f091ea1b77c69ca6ac731a3f3@chromium.org>
Commit-Queue: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>
Commit-Queue: Wenbin Zhang <45ad8a1ff616a38a2202fd35571df81897c5f14f@google.com>
Bot-Commit: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>
Reviewed-by: Wenbin Zhang <45ad8a1ff616a38a2202fd35571df81897c5f14f@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult