Update the use of Yaml::parse passing file content
Update the use of Yaml::parse passing file content

Getting this error:

```
The ability to pass file names to the Symfony\Component\Yaml\Yaml::parse method is deprecated since version 2.2 and will be removed in 3.0. Pass the YAML contents of the file instead.

/Users/mulkave/Developer/sandbox/neoclient-tryout/vendor/neoxygen/neoclient/src/Extension/NeoClientCoreExtension.php:24
/Users/mulkave/Developer/sandbox/neoclient-tryout/vendor/neoxygen/neoclient/src/DependencyInjection/Compiler/NeoClientExtensionsCompilerPass.php:33
/Users/mulkave/Developer/sandbox/neoclient-tryout/vendor/symfony/dependency-injection/Compiler/Compiler.php:117
/Users/mulkave/Developer/sandbox/neoclient-tryout/vendor/symfony/dependency-injection/ContainerBuilder.php:614
/Users/mulkave/Developer/sandbox/neoclient-tryout/vendor/neoxygen/neoclient/src/ClientBuilder.php:447
```
neoxygen/neo4j-neoclient,graphaware/neo4j-php-client,powellke/neo4j-neoclient,powellke/neo4j-neoclient,aequasi/neo4j-php-client,aequasi/neo4j-php-client,ikwattro/neo4j-neoclient,pascaldevink/neo4j-neoclient,powellke/neo4j-neoclient,PandawanTechnology/neo4j-php-client,pascaldevink/neo4j-neoclient,ikwattro/neo4j-neoclient,ikwattro/neo4j-neoclient,neoxygen/neo4j-neoclient,graphaware/neo4j-php-client,PandawanTechnology/neo4j-php-client,pascaldevink/neo4j-neoclient,neoxygen/neo4j-neoclient