Fixed reporting in app development framework

Fixed several reporting-related bugs in io.murano.applications
framework:

* when reporting was relying on the presence of possibly uninitialized
  property of Environment

* when environment for reporting was not accessible due to property
  protection level

* when reporting was done for an instance object name instead of
  hostname

Closes-bug: #1610997

Change-Id: Id517a511937fa1f65b5fec6bcd0ff5dbe1b33812

meta/io.murano.applications/Classes/component.yaml

@@ -17,6 +17,10 @@ Properties:
     Contract: $.string()
     Usage: Runtime
 
+  _env:
+    Contract: $.class(std:Environment)
+    Usage: Runtime
+
 Methods:
   .init:
     Body:

meta/io.murano.applications/Classes/instance.yaml

@@ -36,12 +36,7 @@ Properties:
 Methods:
   .init:
     Body:
-      - $env: $.find(std:Environment)
-      - If: $env
-        Then:
-          - $this._reporter: $env.reporter
-        Else:
-          - $this._reporter: null
+      - $this._env: $.find(std:Environment)
 
   deploy:
     Body:
@@ -54,9 +49,9 @@ Methods:
       - instance:
           Contract: $.class(res:Instance)
     Body:
-      - If: $this._reporter and name($instance) and not $instance.openstackId
+      - If: $this._env and name($instance) and not $instance.openstackId
         Then:
-          - $this._reporter.report($this, 'Provisioning VM for ' + name($instance))
+          - $this._env.reporter.report($this, 'Provisioning VM for ' + $instance.name)
       - $instance.beginDeploy()
 
   .destroy: