Move parsers' logic about 'ExpressionFactoryBean' BeanDefinition into 'IntegrationNamespaceUtils' [INT-2619]

[spring-operator]

Artem Bilan opened INT-2619 and commented

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Issue Links:

• Add support for full RESTFul request-mappings to the HTTP inbound adapters [INT-2312] #6250 Add support for full RESTFul request-mappings to the HTTP inbound adapters