Adding other custom kube options for SolrCloud.

[HoustonPutman]

Addresses feature requests in: #55, and will eventually help with the extended addressability features.

Describe your changes
Adding many configuration options for the SolCloud Services, ConfigMaps and Ingresses. StatefulSet and Pod options have already been added.

These options are flexible and should be able to be easily extended in the future for new options.

Options being added:

type CustomSolrKubeOptions struct {
	// CommonServiceOptions defines the custom options for the common solrCloud Service.
	// +optional
	CommonServiceOptions *ServiceOptions `json:"commonServiceOptions,omitempty"`

	// HeadlessServiceOptions defines the custom options for the headless solrCloud Service.
	// +optional
	HeadlessServiceOptions *ServiceOptions `json:"headlessServiceOptions,omitempty"`

	// NodeServiceOptions defines the custom options for the individual solrCloud Node services, if they are created.
	// These services will only be created when exposing SolrNodes externally via an Ingress in the AddressabilityOptions.
	// +optional
	NodeServiceOptions *ServiceOptions `json:"nodeServiceOptions,omitempty"`

	// ServiceOptions defines the custom options for solrCloud Services.
	// +optional
	ConfigMapOptions *ConfigMapOptions `json:"configMapOptions,omitempty"`

	// IngressOptions defines the custom options for solrCloud Ingress.
	// +optional
	IngressOptions *IngressOptions `json:"ingressOptions,omitempty"`
}

// ServiceOptions defines custom options for services
type ServiceOptions struct {
	// Annotations to be added for the Service.
	// +optional
	Annotations map[string]string `json:"annotations,omitempty"`

	// Labels to be added for the Service.
	// +optional
	Labels map[string]string `json:"labels,omitempty"`
}

// IngressOptions defines custom options for ingresses
type IngressOptions struct {
	// Annotations to be added for the Ingress.
	// +optional
	Annotations map[string]string `json:"annotations,omitempty"`

	// Labels to be added for the Ingress.
	// +optional
	Labels map[string]string `json:"labels,omitempty"`
}

// ConfigMapOptions defines custom options for configMaps
type ConfigMapOptions struct {
	// Annotations to be added for the ConfigMap.
	// +optional
	Annotations map[string]string `json:"annotations,omitempty"`

	// Labels to be added for the ConfigMap.
	// +optional
	Labels map[string]string `json:"labels,omitempty"`
}

[HoustonPutman]

I still need to add tests for the individual Node services, but otherwise, the unit tests are there.

[HoustonPutman]

I should also probably add documentation somewhere about these....