Integration test fixes for CI pipeline (#1259)

* Revert "Added worker to pythonpath (#1215)"

This reverts commit a60ef25cd7.

* Update Python SDK Version to 1.14.1b3 (#1232)

* Update Python SDK Version to 1.14.1b3

* Update setup.py

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Co-authored-by: AzureFunctionsPython <funcdisc@microsoft.com>

* Update Python Worker Version to 4.13.0

* Update Python Worker Version to 4.14.0

* Test fixes

* Installing packages with -U

* Install packages with updates

* Adding python -m to pytest

* Reverting change to codecov.yml

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Co-authored-by: Gavin Aguiar <gavin@GavinPC>
Co-authored-by: AzureFunctionsPython <funcdisc@microsoft.com>

.ci/e2e_integration_test/start-e2e.ps1

@@ -88,7 +88,7 @@ Write-Host "--------------------------------------------------------------------
 Write-Host "Preparing E2E integration tests..." -ForegroundColor Green
 Write-Host "-----------------------------------------------------------------------------`n" -ForegroundColor Green
 python -m pip install -U pip
-pip install -e .[dev]
+python -m pip install -U -e .[dev]
 python setup.py build
 python setup.py extension
 Write-Host "-----------------------------------------------------------------------------`n" -ForegroundColor Green
@@ -97,5 +97,5 @@ Write-Host "--------------------------------------------------------------------
 Write-Host "Running E2E integration tests..." -ForegroundColor Green
 Write-Host "-----------------------------------------------------------------------------`n" -ForegroundColor Green
 $env:CORE_TOOLS_EXE_PATH = "$funcExePath"
-pytest --junitxml=e2e-integration-test-report.xml --reruns 4 tests/endtoend
+python -m pytest --junitxml=e2e-integration-test-report.xml --reruns 4 tests/endtoend
 Write-Host "-----------------------------------------------------------------------------`n" -ForegroundColor Green