[PHP] Decommission "packagePath", add new option "packageName" (#681)

* remove packagePath from php file location, use -o instead

* fix php symfony top folder

* restore pacakgePath

* update php laraavel samples

* remove packagePath from PHP generator

* add new silex files

* update window batch - php silex

* fix openapi3 silex script

samples/server/petstore/php-symfony/SymfonyBundle-php/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/server/petstore/php-symfony/SymfonyBundle-php/.openapi-generator/VERSION

@@ -0,0 +1 @@
+3.2.0-SNAPSHOT