Restore default installed extensions/packages to ubuntu base (GoogleC…

…loudPlatform#445)

* Restore default installed extensions/packages to ubuntu base

* Add test for installing via legacy php.ini method

* Fix legacy extensions test directory

Fix the integration test. (GoogleCloudPlatform#444)

The integration test uses a custom build pipeline. The build pipeline
now has extra arguments for the ubuntu image so we must provide them
here.

Run e2e test just once after ubuntu build (GoogleCloudPlatform#440)

Fixed stackdriver integration (GoogleCloudPlatform#434)

Change the way we check the required version of the dependency (Googl…

…eCloudPlatform#428)

There are still some cases for false negative where the direct
constrant is ok and other indirect dependency has a problem.

Although the issue is not completely fixed, this logic change allows
more legitimate cases which has been failing with the previous code.

It will alleviate GoogleCloudPlatform#426

Change the way we check the required version of the dependency (Googl…

…eCloudPlatform#428)

There are still some cases for false negative where the direct
constrant is ok and other indirect dependency has a problem.

Although the issue is not completely fixed, this logic change allows
more legitimate cases which has been failing with the previous code.

It will alleviate GoogleCloudPlatform#426

shorten tag name (GoogleCloudPlatform#429)

lock redis extension to 3.1.6. 4.0.0 has breaking changes (GoogleClou…

…dPlatform#424)

Fix version check for building mongo (GoogleCloudPlatform#421)

Fix version check for building mongo (GoogleCloudPlatform#421)