Add h5repack tests for paged aggregation

Add tests to h5repack.sh.in to verify options added for paged aggregation work as expected.

tools/test/h5repack/testfiles/GS.h5repack_paged_nopersist.h5.ddl

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+Filename: out-GS.h5repack_paged_nopersist.h5
+Free-space persist: FALSE
+Free-space section threshold: 1 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	Total # of sections: 0
+File space management strategy: H5F_FSPACE_STRATEGY_AGGR
+File space page size: 512 bytes
+Summary of file space information:
+  File metadata: 1272 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 0 bytes/0.0%
+  Unaccounted space: 776 bytes
+Total space: 2448 bytes

tools/test/h5repack/testfiles/S.h5repack_fsm_aggr_persist.h5.ddl

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+Filename: out-S.h5repack_fsm_aggr_persist.h5
+Free-space persist: FALSE
+Free-space section threshold: 1 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	Total # of sections: 0
+File space management strategy: H5F_FSPACE_STRATEGY_AGGR
+File space page size: 4096 bytes
+Summary of file space information:
+  File metadata: 1272 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 0 bytes/0.0%
+  Unaccounted space: 776 bytes
+Total space: 2448 bytes

tools/test/h5repack/testfiles/SP.h5repack_fsm_aggr_nopersist.h5.ddl

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+Filename: out-SP.h5repack_fsm_aggr_nopersist.h5
+Free-space persist: TRUE
+Free-space section threshold: 1 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	# of sections of size 1000 - 9999: 2
+	Total # of sections: 2
+File space management strategy: H5F_FSPACE_STRATEGY_PAGE
+File space page size: 4096 bytes
+Summary of file space information:
+  File metadata: 1602 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 6307 bytes/38.5%
+  Unaccounted space: 8075 bytes
+Total space: 16384 bytes

tools/test/h5repack/testfiles/SP.h5repack_paged_persist.h5.ddl

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+Filename: out-SP.h5repack_paged_persist.h5
+Free-space persist: FALSE
+Free-space section threshold: 1 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	Total # of sections: 0
+File space management strategy: H5F_FSPACE_STRATEGY_NONE
+File space page size: 4096 bytes
+Summary of file space information:
+  File metadata: 1272 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 0 bytes/0.0%
+  Unaccounted space: 0 bytes
+Total space: 1672 bytes

tools/test/h5repack/testfiles/SPT.h5repack_aggr.h5.ddl

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+Filename: out-SPT.h5repack_aggr.h5
+Free-space persist: TRUE
+Free-space section threshold: 5 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	# of sections of size 100 - 999: 1
+	Total # of sections: 1
+File space management strategy: H5F_FSPACE_STRATEGY_FSM_AGGR
+File space page size: 4096 bytes
+Summary of file space information:
+  File metadata: 1485 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 680 bytes/26.5%
+  Unaccounted space: 0 bytes
+Total space: 2565 bytes

tools/test/h5repack/testfiles/STG.h5repack_none.h5.ddl

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+Filename: out-STG.h5repack_none.h5
+Free-space persist: FALSE
+Free-space section threshold: 10 bytes
+Small size free-space sections (< 10 bytes):
+	Total # of small size sections: 0
+Free-space section bins:
+	Total # of sections: 0
+File space management strategy: H5F_FSPACE_STRATEGY_PAGE
+File space page size: 2048 bytes
+Summary of file space information:
+  File metadata: 1272 bytes
+  Raw data: 400 bytes
+  Amount/Percent of tracked free space: 0 bytes/0.0%
+  Unaccounted space: 2424 bytes
+Total space: 4096 bytes