Updated test case for mortar projector in conjunction with the AV solver


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7037 04224531-1f84-46d8-96ce-875b9e37dce3
small fix in rare combination of functionality in RigidMeshMapper


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7038 04224531-1f84-46d8-96ce-875b9e37dce3
Further work for the generic version of level projector. Now there is also a generic way to introduce the nodal projector. Worked also with the logic of eliminating redundant nodes and edges. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7039 04224531-1f84-46d8-96ce-875b9e37dce3