MCLOUD-6381: Update error messages

Author: oshmyheliuk

src/Test/Unit/Config/Schema/Validator/SplitDbTest.php

@@ -51,7 +51,7 @@ public function testValidateWithError(): void
         $this->assertEquals(
             new Error(
                 'The SOME_VARIABLE variable contains the invalid value.'
-                .' It should be an array with following values:: [quote, sales].'
+                .' It should be an array with following values: [quote, sales].'
             ),
             $this->validator->validate('SOME_VARIABLE', ['invalid_value'])
         );

src/Test/Unit/Config/Validator/Deploy/ReportDirNestingLevelTest.php

@@ -140,7 +140,7 @@ public function testValidateWithoutEnvVarWithoutConfigValue()
             ->method('error')
             ->with(
                 'The directory nesting level value for error reporting has not been configured.',
-                'You can configure the setting using the `config.report.dir_nesting_level`'
+                'You can configure the setting using the `config.report.dir_nesting_level` variable'
                 . ' in the file ' . $this->reportConfigFile
             );