Databases and java pester tests (#2338)

* added mongodb postgres java tests

* fixed 1.7 and 12 Java on Ubuntu 20

* several improvments

* removed update-environment function

* add etc-environment import

* removed sourcing invoke-tests

Co-authored-by: Leonid Lapshin <originalnoe-nazvanie@yandex.ru>

images/linux/scripts/tests/Databases.Tests.ps1

@@ -0,0 +1,30 @@
+Describe "MongoDB" {
+    It "<ToolName>" -TestCases @(
+        @{ ToolName = "mongo" }
+        @{ ToolName = "mongod" }
+    ) {
+        "$ToolName --version" | Should -ReturnZeroExitCode
+    }
+}
+
+Describe "PostgreSQL" {
+
+    It "PostgreSQL Service" {
+        "sudo systemctl start postgresql" | Should -ReturnZeroExitCode
+        (Get-CommandResult "pg_isready").Output | Should -Be "/var/run/postgresql:5432 - accepting connections"
+        "sudo systemctl stop postgresql" | Should -ReturnZeroExitCode 
+    }
+}
+
+Describe "MySQL" {
+    It "MySQL CLI" {
+        "mysql -V" | Should -ReturnZeroExitCode
+    }
+
+    It "MySQL Service" {
+        "sudo systemctl start mysql" | Should -ReturnZeroExitCode 
+        "sudo mysql -vvv -e 'CREATE DATABASE smoke_test' -uroot -proot" | Should -ReturnZeroExitCode
+        "sudo mysql -vvv -e 'DROP DATABASE smoke_test' -uroot -proot" | Should -ReturnZeroExitCode
+        "sudo systemctl stop mysql" | Should -ReturnZeroExitCode 
+    }
+}