IProgressMonitor monitor = new NullProgressMonitor();

	TeamPlatform.startup();

	//RepositoryPackage.eINSTANCE.eContents(); 

	ITeamRepository repo = TeamPlatform.getTeamRepositoryService().getTeamRepository(repositoryURI);

    //ClassLoader loader = Thread.currentThread().getContextClassLoader(); 

    //Thread.currentThread().setContextClassLoader(TeamRepository.class.getClassLoader()); 

	repo.registerLoginHandler(new ITeamRepository.ILoginHandler() {

    		public ILoginInfo challenge(ITeamRepository repository) {

        		return new ILoginInfo() {

            			public String getUserId() {

                			return "userid";

            			}

            			public String getPassword() {

                			return "password";                        

            			}

        		};

    		}

	});

	repo.login(monitor);

    //Thread.currentThread().setContextClassLoader(loader); 

https://jazz.net/forums/viewtopic.php?t=16564&highlight=missing+foundation+component+tag

The issue is because of missing plugin configurations in eclipse classes, caused by classloading issues.

WebSphere 7 is implemented using OSGI technology like eclipse, so the eclipse platform classes by default are loaded from WebSphere, and the ones not by RTC client libraries included in the web application.

A possible solution is to include the lib classes into the webapp and reverse the class loading policy. Be careful to remove javax.servlet jar (included into RTC clint libraries), in order to be able to use the websphere classes for this specific library.

https://jazz.net/forums/viewtopic.php?t=5458

For the version check issue, you need to ensure that your client includes the com.ibm.team.rtc.common plugin, which includes the extension:

"<extension
" point="com.ibm.team.repository.common.componentConfigurations">
" <componentConfiguration
" clientCompatibilityVersion="3.0"
" id="com.ibm.team.rtc"
" version="3.0">
" </componentConfiguration>
" </extension>

There's a similar extension for Foundation in com.ibm.team.repository.common, which you probably already have or nothing would work.

To see how these get processed, the relevant code is in
com.ibm.team.repository.client.internal.TeamRepository.checkServerVersionMatches()

 StandaloneFil W com.ibm.team.repository.common.internal.util.StandaloneExtensionRegistry getBundleLocalization Could not open META-INF/MANIFEST.MF for bundle: jar:file:/C:/IBM/WebSphere/AppServer/lib/pc-appext.jar!/plugin.xml

 StandaloneFil W com.ibm.team.repository.common.internal.util.StandaloneExtensionRegistry getBundleLocalization Could not open META-INF/MANIFEST.MF for bundle: jar:file:/C:/IBM/WebSphere/AppServer/lib/rrd-appext.jar!/plugin.xml

com.ibm.team.repository.common.TeamRepositoryException: Badly configured client. Missing a foundation component tag. 

at com.ibm.team.repository.client.internal.TeamRepository.checkServerVersionMatches(TeamRepository.java:1657) 

at com.ibm.team.repository.client.internal.TeamRepository.internalLogin(TeamRepository.java:1445) 

at com.ibm.team.repository.client.internal.TeamRepository.login(TeamRepository.java:618) 

at ccm.servlets.TryLogin.doGet(TryLogin.java:84) 

at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)