updates win_msi to allow install to wait

- adds additional wait param
- updates to use Start-Process to allow -Wait
	- this will wait for install/uninstall to complete before continue

windows/win_msi.ps1

@@ -23,12 +23,18 @@ $params = Parse-Args $args;
 
 $result = New-Object psobject;
 Set-Attr $result "changed" $false;
+$wait = $false
 
 If (-not $params.path.GetType)
 {
     Fail-Json $result "missing required arguments: path"
 }
 
+If ($params.wait -eq "true" -Or $params.wait -eq "yes")
+{
+  $wait = $true
+}
+
 $extra_args = ""
 If ($params.extra_args.GetType)
 {
@@ -44,13 +50,27 @@ If ($params.creates.GetType -and $params.state.GetType -and $params.state -ne "a
 }
 
 $logfile = [IO.Path]::GetTempFileName();
-if ($params.state.GetType -and $params.state -eq "absent")
+If ($params.state.GetType -and $params.state -eq "absent")
 {
-    msiexec.exe /x $params.path /qb /l $logfile $extra_args;
+  If ($wait)
+  {
+    Start-Process -FilePath msiexec.exe -ArgumentList "/x $params.path /qb /l $logfile $extra_args" -Verb Runas -Wait;
   }
   Else
   {
-    msiexec.exe /i $params.path /qb /l $logfile $extra_args;
+    Start-Process -FilePath msiexec.exe -ArgumentList "/x $params.path /qb /l $logfile $extra_args" -Verb Runas;
+  }
+}
+Else
+{
+  If ($wait)
+  {
+    Start-Process -FilePath msiexec.exe -ArgumentList "/i $params.path /qb /l $logfile $extra_args" -Verb Runas -Wait;
+  }
+  Else
+  {
+    Start-Process -FilePath msiexec.exe -ArgumentList "/i $params.path /qb /l $logfile $extra_args" -Verb Runas;
+  }
 }
 
 Set-Attr $result "changed" $true;

windows/win_msi.py

@@ -45,6 +45,16 @@ options:
         description:
             - Path to a file created by installing the MSI to prevent from
               attempting to reinstall the package on every run
+    wait:
+        version_added: ""
+        description:
+            - Specify whether to wait for install or uninstall to complete before continuing.
+        choices:
+            - true
+            - yes
+            - false
+            - no
+        default: false
 author: Matt Martz
 '''
 
@@ -52,6 +62,9 @@ EXAMPLES = '''
 # Install an MSI file
 - win_msi: path=C:\\\\7z920-x64.msi
 
+# Install an MSI, and wait for it to complete before continuing
+- win_msi: path=C:\\\\7z920-x64.msi wait=true
+
 # Uninstall an MSI file
 - win_msi: path=C:\\\\7z920-x64.msi state=absent
 '''