PostgreSQL install on Ubuntu/Windows. (#636)

* added windows installation script for postgresql

* removed if from Start-PostreSQL

* added script to packar template.

* changed postgresql.sh for ubuntu.

* postgresql stop and disalbe services.

* change name of the functions

* Stop postgreSQL after validation instead of start.

* added validation and re-work installation prcoedur

* remove redundunt code from psql

* correct intendation

* path to Path

* added PostgreSQL validation procedure.

* Removed useless last line.

* redundunt parameter passed in function call.

* removed repeated part of code.

* removed Stop function since it was useless.

* spaces

* spaces =

* Update Windows2019-Azure.json

* resolve confictls

* added validate and install postgresql

* added password to choco install and variables.

* add new system variables.

* added --params flag

* added correct quotas

* added logging for PostgreSQL install

Co-authored-by: Dariy.Nurgaleev <d.nurgaleev@trueengineering.ru>

images/win/scripts/Installers/Install-PostgreSQL.ps1

@@ -0,0 +1,22 @@
+$ErrorActionPreference = "Stop"
+
+Import-Module -Name ImageHelpers
+
+#Define user and password for PostgreSQL database
+$postgresusr="postgres"
+$postgrespwd="root"
+
+#Prepare environment variable for validation
+Set-SystemVariable -SystemVariable PGUSER -Value $postgresusr
+Set-SystemVariable -SystemVariable PGPASSWORD -Value $postgrespwd
+#Install latest PostgreSQL
+
+cinst postgresql --params "/Password:$postgrespwd" --params-global --debug --verbose
+
+#Get Path to pg_ctl.exe
+$paths = (Get-CimInstance Win32_Service -Filter "Name LIKE 'postgresql-%'").PathName
+#Parse output of command above to obtain pure path
+$pgbin = $paths.split('"')[1].replace("\pg_ctl.exe", "")
+#Added PostgreSQL bin path into PATH variable.
+Add-MachinePathItem $pgbin
+