[PLINK-316] Create static pool of PicketLink STS clients to improve
performance of login modules

Conflicts:
	picketlink-jbas-common/src/main/java/org/picketlink/identity/federation/bindings/jboss/auth/SAML2STSCommonLoginModule.java
	picketlink-jbas-common/src/main/java/org/picketlink/trust/jbossws/jaas/JBWSTokenIssuingLoginModule.java
	picketlink-jbas7/src/main/java/org/picketlink/identity/federation/PicketLinkLoggerImpl.java
[BZ1069126] enhancemenents to STS client pool

Conflicts:
	picketlink-jbas-common/src/main/java/org/picketlink/trust/jbossws/jaas/JBWSTokenIssuingLoginModule.java
	picketlink-jbas7/src/main/java/org/picketlink/identity/federation/PicketLinkLoggerImpl.java
	picketlink-jbas7/src/main/java/org/picketlink/identity/federation/PicketLinkMessages.java
[PLINK-442] removing AccountConfirmationPage field as it is not needed.
Merge pull request #69 from pskopek/eap-fixies

The latest fixies from EAP 6.3 branch