Change install prefix to /opt/matlab

manifests/install.pp

@@ -11,7 +11,7 @@ define matlab::install(      # $namevar matlab release version
   $licensekey,      # format: #####-#####-#####-#####
   $licensefile,      # license.lic as provided by mathworks
   $licenseagree = false,    # do you agree to license, true/false ?
-  $prefix = '/usr/local'    # install prefix
+  $prefix = '/opt/matlab'    # install prefix
 ) {
   include 'matlab'
   include matlab::vardir