Create function to clean xml white nodes

[fugerit79]

We want to clean a XML which looks like :

<config>
  	
  <bean id="4.1">
    		
    <field>field21</field>
    		
	
    <labelKey>sec_41_Testlabelwith</labelKey>
  </bean>
  	
  <bean id="4.2">
    		
    <field>field22</field>
    		
	
    <labelKey>sec_42_Testlabel2</labelKey>
  </bean>
  	
  <bean id="4.2">
    		
    <field>field23</field>
    		
	
    <labelKey>sec_42_Testlabel4</labelKey>
  </bean>
  
</config>

making it looks like as :

<config>
  <bean id="4.1">
    <field>field21</field>
    <labelKey>sec_41_Testlabelwith</labelKey>
  </bean>
  <bean id="4.2">
    <field>field22</field>
    <labelKey>sec_42_Testlabel2</labelKey>
  </bean>
  <bean id="4.2">
    <field>field23</field>
    <labelKey>sec_42_Testlabel4</labelKey>
  </bean>
</config>