[Build] Fix docker image install python3.7-dev problem

[gaoran10]

Motivation

Currently, when building docker image using branch-2.7, we met a problem, it seems that installing python3.7-dev in some os version need to add the apt repo ppa:deadsnakes/ppa.

error logs

[INFO] Building dependency tree...
[INFO] 
[INFO] Reading state information...
[INFO] Package python3.7 is not available, but is referred to by another package.
[INFO] This may mean that the package is missing, has been obsoleted, or
[INFO] is only available from another source
[INFO] 
[INFO] Package libreadline-gplv2-dev is not available, but is referred to by another package.
[INFO] This may mean that the package is missing, has been obsoleted, or
[INFO] is only available from another source
[INFO] 
[INFO] E: Package 'python3.7' has no installation candidate
[INFO] E: Unable to locate package python3.7-dev
[INFO] E: Couldn't find any package by glob 'python3.7-dev'
[INFO] E: Couldn't find any package by regex 'python3.7-dev'
[INFO] E: Package 'libreadline-gplv2-dev' has no installation candidate
[INFO] 
Error:  The command '/bin/sh -c apt-get update      && apt-get install -y netcat dnsutils less procps iputils-ping                  python3.7 python3.7-dev python3-setuptools python3-yaml python3-kazoo                  libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev                  curl      && apt-get clean      && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 100

Or maybe we could sync the DockerFile of the branch-2.7 with the branch master's.

Modifications

Add apt repo ppa:deadsnakes/ppa before apt update.

Does this pull request potentially affect one of the following parts:

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (no)
• The public API: (no)
• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (no)

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[codelipenghui]

@gaoran10 I have reverted the change, you may accidentally click the merge button. Please create a new PR for fixing the build issue, thanks.

[gaoran10]

Sorry, my mistake push.