testing/py3-boto3: upgrade to 1.10.7

Update the required version of the dependency on py3-botocore according to
`setup.py`.
7 jobs for !997 with py3-boto3-1.10.7 in 2 minutes and 26 seconds
detached
Status Job ID Name Coverage
  Lint
passed lint #10722
docker-alpine x86_64

00:00:18

 
  Build
passed build-aarch64 #10727
docker-alpine ci-build aarch64

00:00:45

passed build-armv7 #10728
docker-alpine ci-build armv7

00:00:49

passed build-ppc64le #10726
docker-alpine ci-build ppc64le

00:02:06

passed build-s390x #10725
docker-alpine ci-build s390x

00:00:59

passed build-x86 #10724
docker-alpine ci-build x86

00:00:40

passed build-x86_64 #10723
docker-alpine ci-build x86_64

00:00:40