Refactor test namespaces

[aaronweeden]

Description

Same as ubccr/xdmod#1789 but for the xdmod-appkernels module.

This PR also renames integration_tests to integration to be consistent with the main xdmod module.

This PR also fixes expected results from the integration tests.

Tests performed

To make sure the changes in this PR don't affect the tests that are run, I did the following in a Docker container running tools-ext-01.ccr.xdmod.org/xdmod-10.5.0-x86_64:rockylinux8.5-0.3:

1. Run the following commands:

   export COMPOSER_ALLOW_SUPERUSER=1
   export XDMOD_REALMS='jobs,storage,cloud'
   export XDMOD_BRANCH=xdmod11.0
   export XDMOD_MODULE_NAME=appkernels
   export XDMOD_IS_CORE=yes
   export XDMOD_INSTALL_DIR=/xdmod
   export XDMOD_TEST_MODE=fresh_install
   dnf -y install --setopt=tsflags=nodocs python3
   openssl genrsa -rand /proc/cpuinfo:/proc/dma:/proc/filesystems:/proc/interrupts:/proc/ioports:/proc/uptime 2048 > /etc/pki/tls/private/localhost.key
   /usr/bin/openssl req -new -key /etc/pki/tls/private/localhost.key -x509 -sha256 -days 365 -set_serial $RANDOM -extensions v3_req -out /etc/pki/tls/certs/localhost.crt -subj "/C=XX/L=Default City/O=Default Company Ltd"
   git clone https://github.com/ubccr/xdmod-appkernels /xdmod-appkernels
   cd /xdmod-appkernels
   mkdir -p ./shippable/testresults
   export XDMOD_APPKERNELS_DIR=/xdmod-appkernels
   export XDMOD_SOURCE_DIR=/xdmod
   ./tests/runtests.sh
   cd tests/unit
   sed -i '/printerClass/d' phpunit.xml.dist
   phpunit --debug . > /unit-before.txt
   git clone https://github.com/aaronweeden/xdmod-appkernels -b refactor-test-namespaces /xdmod-appkernels-new
   rm -r /xdmod-appkernels/tests
   cp -r /xdmod-appkernels{-new,}/tests
   cd /xdmod-appkernels/tests/unit
   phpunit --debug . > /unit-after.txt
   cd ../integration
   phpunit --debug .
   

2. Confirm that the last command ran both of these tests successfully:

IntegrationTests\REST\internal_dashboard\DashboardAppKernelTest::testResourceNullParam
IntegrationTests\REST\internal_dashboard\DashboardAppKernelTest::testKernelNullParam

1. Compare /unit-{before,after}.txt and make sure the only differences are namespace names and amount of time the tests ran.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project as found in the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.