Perform 1.7.0 release

[yuri-sergiichuk]

This is a meta issue with a list of steps needed to perform a successful release of the Spine v1.70.

Please follow the steps below while updating a repository:

• Update versions to 1.7.0.
• Regenerate pom.xml and license-report.md where appropriate.
• Update mentions of the artifacts in README.md files where appropriate.
• Create a release PR with release notes.
• Merge the PR.
• Create a GitHub release with v1.7.0 tag from the master branch.

Please update the following repositories:

• base
• time
• core-java
• gcloud-java
• jdbc-storage
• web
• bootstrap

After all the libraries are released:

• Migrate examples to v1.7.0.
• Migrate template to v1.7.0.
• Migrate chat-bot to v1.7.0. (optional)
• Update Hello World guide to use v1.7.0 instead of v1.6.0.
• Create announcement texts.
• Publish on social networks.

[yuri-sergiichuk]

base release PR: SpineEventEngine/base-libraries#598 and SpineEventEngine/base-libraries#600

[yuri-sergiichuk]

time release PR: SpineEventEngine/time#106

[yuri-sergiichuk]

core-java release PR: SpineEventEngine/core-jvm#1344

[yuri-sergiichuk]

gcloud-java release PR: SpineEventEngine/gcloud-java#159

[yuri-sergiichuk]

jdbc-storage release PR: SpineEventEngine/jdbc-storage#153

[yuri-sergiichuk]

web release PR: SpineEventEngine/web#161

[yuri-sergiichuk]

bootstrap release PR: SpineEventEngine/bootstrap#78

[yuri-sergiichuk]

template migration PR: SpineEventEngine/template#3

[yuri-sergiichuk]

hello example migration PR: spine-examples/hello#74

[yuri-sergiichuk]

todo-list example migration PR: spine-examples/todo-list#181

[yuri-sergiichuk]

kanban example migration PR: spine-examples/kanban#54

[yuri-sergiichuk]

airport example migration PR: spine-examples/airport#6

[yuri-sergiichuk]

server-quickstart example migration PR: spine-examples/server-quickstart#63

[yuri-sergiichuk]

blog example migration PR: spine-examples/blog#38